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Purpose: Periprosthetic femoral fractures (PPFs) around the hip are challenging complications in orthopaedic surgery, particularly Vancouver type B2 (VTB2) fractures. The surgical management of these fractures is crucial and depends on various factors. Cementless short taper stem with plate osteosynthesis is an alternative surgical technique. This study aims to compare the outcomes of this surgical technique with revision arthroplasty (RA) with long stem in the treatment of VTB2 PPFs. Methods: This retrospective study was conducted in a single medical institute from February 2010 to May 2019. Patients who had received either total hip arthroplasty or bipolar hemiarthroplasty and subsequently developed a VTB2 PPF were included; patients who sustained intra-operative fractures or received a cemented stem previously were excluded from the analysis. The patients were divided into two groups: group I received RA with cementless long stem, while group II underwent RA with cementless short taper stem with plate osteosynthesis. Demographic data, radiographic and functional outcomes, and complications were analyzed between the two groups. Results: A total of 85 patients diagnosed with VTB2 PPFs were included in the study. There were no significant differences between the two groups in terms of demographic data, including age, gender, mean follow-up times, estimated blood loss, and operative times. The radiographic results showed that there was no significant difference in the incidence of subsidence and implant stability between the two groups. However, group II tended to have less subsidence and periprosthetic osteolysis. Patients in group II had significantly better functional scores (mean Harris hip score: post-operative: 60.2 in group I and 66.7 in group ii; last follow-up: 77.4 in group 1 and 83.2 in group II (both p < 0.05)). There were no significant differences in the overall complication rate, including infection, dislocation, re-fracture, and revision surgery, between the two groups. Conclusions: Both surgical techniques, cementless long stem and cementless short taper stem with plate osteosynthesis, are effective in the treatment of Vancouver B2 PPFs, with no significant differences in outcomes or complications. However, patients in cementless short taper stem with plate osteosynthesis had better functional scores at both post-operative and the last follow-up. [ABSTRACT FROM AUTHOR]

Introduction: Modular femoral components allow for patient-specific restoration of hip joint geometry and the reconstruction of extensive bone defects in revision total hip arthroplasty (THA); however, potential problems of modular implants such as taper corrosion and the risk of implant fracture continue to be of concern. The aim of the present study was to evaluate the clinical and radiological results of a cementless modular revision stem following revision surgery due to aseptic loosening and periprosthetic fracture and to assess patient-reported outcome measures (PROMs) in these patients at mid-term follow-up. Materials and methods: In this study, a consecutive cohort of 75 patients who underwent primary revision THA at our institution using a modular cementless stem design (MRP-TITAN stem) was retrospectively evaluated at a mean follow-up of 7.7 years. Kaplan–Meier survivorship analyses were performed with revision of the femoral component for any reason as the end point. The Harris-Hip Score, the UCLA Activity Score, the Forgotten Joint Score and the SF-12 Score were used for clinical assessment. We used the Wilcoxon signed rank test to compare pre- and postoperative clinical scores. Results: Overall stem survival with the endpoint stem re-revision for any reason was 85.4% at a mean follow-up of 7.7 years (range 2.4–14 years). Stem survival was 89.5% in the aseptic loosening group and 78.3% in the periprosthetic fracture group with no statistically significant difference between both groups (p = 0.107). One patient had to be revised due to taper fracture. PROMs improved significantly up to the latest follow-up, and radiographic evaluation showed full osseointegration of all stems in this cohort. Conclusions: Revision THA using a modular cementless titanium revision stem demonstrated adequate clinical and radiological results at mid- to long-term follow-up in this cohort. Cementless revision stems are a useful treatment option to restore the anatomy, especially in deformed hips and in complex revision hip arthroplasty. However, there are some significant disadvantages related to an increased risk of mechanical failure such as corrosion/fretting damage and implant fracture. Future high-quality prospective studies with longer follow-up are necessary to confirm the supposed advantages. [ABSTRACT FROM AUTHOR]

Background: The influence of THA stem design on periprosthetic femoral fractures (PFFs) risk is subject of debate. This study aims to compare the effects of different cementless stem designs on stress–strain distributions in both physiological and osteoporotic femur under various loading conditions. Materials: A biomechanical study using finite-element analysis was conducted. Four models were developed: three with implanted femurs and a native one chosen as control. Each model was analyzed for both healthy and osteoporotic bone. The following stem designs were examined: short anatomical stem with femoral neck preservation, double-wedge stem, and anatomical standard stem. Three loading conditions were assessed: gait, sideways falling, and four-point bending. Results: During gait in physiological bone, the anatomical stem and the short anatomical stem with femoral neck preservation showed stress distribution similar to the native model. The double-wedge stem reduced stress in the proximal area but concentrated it in the meta-diaphysis. In osteoporotic bone, the double-wedge stem design increased average stress by up to 10%. During sideways falling, the double-wedge stem exhibited higher stresses in osteoporotic bone. No significant differences in average stress were found in any of the studied models during four-point bending. Conclusion: In physiological bone, anatomical stems demonstrated stress distribution comparable to the native model. The double-wedge stem showed uneven stress distribution, which may contribute to long-term stress shielding. In the case of osteoporotic bone, the double-wedge stem design resulted in a significant increase in average stress during both gait and sideways falling, potentially indicating a higher theoretical risk of PFF. [ABSTRACT FROM AUTHOR]

This case-control study evaluated the incidences and outcomes of interprosthetic femoral fracture (IPFF) (Group I) and performed comparisons with Vancouver type C (Group II) and Rorabeck type II (Group III) periprosthetic femoral fractures (PPFF) occurring at similar anatomic sites. A retrospective analysis was performed for all patients who had a previously implanted total hip arthroplasty (THA) and total knee arthroplasty (TKA), who lived in the hospital district and had undergone surgery due to PPFF. A total of 153 PPFFs [Group I (n = 31), Group II (n = 21), and Group III (n = 108)] were included. The annual incidences of PPFFs were summarized per 100,000 individuals. The risks of complications, reoperations, and mortalities were evaluated for all groups. The mean population-based annual incidence was 0.9 per 100,000 person years for Group I, 0.7 per 100,000 person years for Group II, and 3.1 per 100,000 person years for Group III. A total of 25 of 153 (16%) major complications were found and 23 of 153 (13%) cases resulted in a revision surgery. The cumulative incidence of death in Group I was 50.4% at 10 years, in Group II it was 63.8% at 10 years, and in Group III it was 74.9% at 10 years. The annual incidence of the IPFF almost doubled while the incidence of Vancouver type C stayed stable and Rorabeck type II incidence increased 5-fold. Most of the major complications occurred in IPFF group, while Rorabeck type II patients had the worst survival. [ABSTRACT FROM AUTHOR]

Abstract Background Femoral offset (FO) restoration plays an important role in improving the prognosis and quality of life of patients undergoing hip replacement. However, it is not given enough attention in revisions among patients with periprosthetic femoral fractures (PPFFs); instead, more attention is given to reduction, fixation of fractures and stabilizing prostheses. The primary objective of this study was to evaluate the effect of FO restoration on the function of the hip joint in revisions of patients with PPFF of Vancouver B2. Moreover, we studied whether there is a difference in FO restoration between modular and nonmodular stems. Methods A retrospective review of 20 patients with PPFF of Vancouver B2 revised with a tapered fluted modular titanium stem and 22 patients with PPFF of Vancouver B2 revised with a tapered fluted nonmodular titanium stem from 2016 to 2021 was conducted. Based on the difference between the FO of the affected side and that of the healthy side, 26 patients were allocated into Group A (difference ≤ 4 mm), and 16 patients were allocated into Group B (difference > 4 mm). The postoperative Harris Hip Score (HHS), range of motion of the hip joint, length of both lower limbs and dislocation were compared between Group A and Group B. The proportions of patients with FO restoration (difference ≤ 4 mm) and stem subsidence were compared between the modular and nonmodular groups. Results The mean follow-up time was 34.3 ± 17.3 months, and all cases achieved fracture healing at the last visit. Patients in Group A had a higher HHS, larger range of abduction, fewer dislocations and less limb length discrepancy (LLD). Patients in the modular group had a higher proportion of FO restoration and less subsidence. Conclusion FO restoration improves postoperative hip joint function and reduces dislocation and LLD in revisions of patients with PPFF of Vancouver B2. Compared with nonmodular prostheses, modular prostheses tend to be easier for FO restoration under complex circumstances.

Objectives: As currently there is no existing biomechanical work on the topic of interest, the aim of the current study was to investigate the effect of cerclage banding distally to an intraoperatively occurring proximal periprosthetic femoral clamshell fracture versus a non-fractured femur after total hip arthroplasty. Methods: A diaphyseal anchoring stem was implanted in twenty paired human cadaveric femora, assigned to a treatment and a control group. In the treatment group, each specimen was fitted with a cerclage band placed 3 mm distally to a clamshell fracture, created with an extent of 40% of the anchoring length of the stem. The resulting fragment was not treated further. The contralateral specimens were left with the stems without further fracture creation or treatment. All constructs were tested under progressively increasing cyclic axial loading until failure. Relative bone-implant movements were monitored by motion tracking. Results: Number of cycles and the corresponding load at stem loosening, defined as 1 mm displacement of the stem along the shaft axis, were 31,417 ± 8870 and 3641.7 ± 887 N in the control group, and 26,944 ± 11,706 and 3194.4 ± 1170.6 N in the treatment group, respectively, with no significant differences between them, p = 0.106. Conclusion: From a biomechanical perspective, cerclage banding distally to an intraoperative clamshell fracture with an extent of 40% of the anchoring length of the stem demonstrated comparable resistance against hip stem loosening versus a non-fractured femur. It may therefore represent a valid treatment option to restore the full axial stability of a diaphyseal anchoring stem. In addition, it may be considered to keep the medial wall fragment unfixed, thus saving operative time and minimizing associated risks. [ABSTRACT FROM AUTHOR]

Aims: The aim of this study was to describe services available to patients with periprosthetic femoral fracture (PPFF) in England and Wales, with focus on variation between centres and areas for care improvement. Methods: This work used data freely available from the National Hip Fracture Database (NHFD) facilities survey in 2021, which asked 21 questions about the care of patients with PPFFs, and nine relating to clinical decision-making around a hypothetical case. Results: Of 174 centres contributing data to the NHFD, 161 provided full responses and 139 submitted data on PPFF. Lack of resources was cited as the main reason for not submitting data. Surgeon (44.6%) and theatre (29.7%) availability were reported as the primary reasons for surgical delay beyond 36 hours. Less than half had a formal process for a specialist surgeon to operate on PPFF at least every other day. The median number of specialist surgeons at each centre was four (interquartile range (IQR) 3 to 6) for PPFF around both hips and knees. Around one-third of centres reported having one dedicated theatre list per week. The routine discussion of patients with PPFF at local and regional multidisciplinary team meetings was lower than that for all-cause revision arthroplasties. Six centres reported transferring all patients with PPFF around a hip joint to another centre for surgery, and this was an occasional practice for a further 34. The management of the hypothetical clinical scenario was varied, with 75 centres proposing ORIF, 35 suggested revision surgery and 48 proposed a combination of both revision and fixation. Conclusion: There is considerable variation in both the organization of PPFF services England and Wales, and in the approach taken to an individual case. The rising incidence of PPFF and complexity of these patients highlight the need for pathway development. The adoption of networks may reduce variability and improve outcomes for patients with PPFF. Cite this article: Bone Jt Open 2023;4(5):378–384.

Background: Femoral offset (FO) restoration plays an important role in improving the prognosis and quality of life of patients undergoing hip replacement. However, it is not given enough attention in revisions among patients with periprosthetic femoral fractures (PPFFs); instead, more attention is given to reduction, fixation of fractures and stabilizing prostheses. The primary objective of this study was to evaluate the effect of FO restoration on the function of the hip joint in revisions of patients with PPFF of Vancouver B2. Moreover, we studied whether there is a difference in FO restoration between modular and nonmodular stems. Methods: A retrospective review of 20 patients with PPFF of Vancouver B2 revised with a tapered fluted modular titanium stem and 22 patients with PPFF of Vancouver B2 revised with a tapered fluted nonmodular titanium stem from 2016 to 2021 was conducted. Based on the difference between the FO of the affected side and that of the healthy side, 26 patients were allocated into Group A (difference ≤ 4 mm), and 16 patients were allocated into Group B (difference > 4 mm). The postoperative Harris Hip Score (HHS), range of motion of the hip joint, length of both lower limbs and dislocation were compared between Group A and Group B. The proportions of patients with FO restoration (difference ≤ 4 mm) and stem subsidence were compared between the modular and nonmodular groups. Results: The mean follow-up time was 34.3 ± 17.3 months, and all cases achieved fracture healing at the last visit. Patients in Group A had a higher HHS, larger range of abduction, fewer dislocations and less limb length discrepancy (LLD). Patients in the modular group had a higher proportion of FO restoration and less subsidence. Conclusion: FO restoration improves postoperative hip joint function and reduces dislocation and LLD in revisions of patients with PPFF of Vancouver B2. Compared with nonmodular prostheses, modular prostheses tend to be easier for FO restoration under complex circumstances. [ABSTRACT FROM AUTHOR]

Due to increasing volume of total hip arthroplasties, periprosthetic femoral fractures have become a common complication with increased revision burden and perioperative morbidity. The objective of this study was to evaluate the fixation stability of Vancouver B2 fractures treated with 2 techniques. A common B2 fracture was created by reviewing 30 type B2 cases. The fracture was then reproduced in 7 pairs of cadaveric femora. The specimens were divided into 2 groups. In Group I ("reduce-first"), the fragments were reduced first, followed by implantation of a tapered fluted stem. In Group II ("ream-first"), the stem was implanted in the distal femur first, followed by fragment reduction and fixation. Each specimen was loaded in a multiaxial testing frame with 70% of peak load during walking. A motion capture system was used to track the motion of the stem and fragments. The average stem diameter in Group II was 16.1 ± 0.4 mm, versus 15.4 ± 0.5 mm in Group I. The fixation stability was not significantly different in the 2 groups. After the testing, the average stem subsidence was 0.36 ± 0.31 mm and 0.19 ± 0.14 mm (P =.17) and the average rotation was 1.67 ± 1.30° and 0.91 ± 1.11° (P =.16) in Groups I and II, respectively. Compared to the stem, there was less motion of the fragments and there was no difference between the 2 groups (P >.05). When tapered fluted stems were used in combination with cerclage cables for treatment of Vancouver type B2 periprosthetic femoral fractures, both the "reduce-first" and "ream-first" techniques showed adequate stem and fracture stability. [ABSTRACT FROM AUTHOR]

AimsThe objectives of this study were to investigate the patient characteristics and mortality of Vancouver type B periprosthetic femoral fractures (PFF) subgroups divided into two groups according to femoral component stability and to compare postoperative clinical outcomes according to treatment in Vancouver type B2 and B3 fractures.MethodsA total of 126 Vancouver type B fractures were analyzed from 2010 to 2019 in 11 associated centres' database (named TRON). We divided the patients into two Vancouver type B subtypes according to implant stability. Patient demographics and functional scores were assessed in the Vancouver type B subtypes. We estimated the mortality according to various patient characteristics and clinical outcomes between the open reduction internal fixation (ORIF) and revision arthroplasty (revision) groups in patients with unstable subtype.ResultsThe one-year mortality rate of the stable and unstable subtype of Vancouver type B was 9.4% and 16.4%. Patient demographic factors, including residential status and pre-injury mobility were associated with mortality. There was no significant difference in mortality between patients treated with ORIF and Revision in either Vancouver B subtype. Patients treated with revision had significantly higher Parker Mobility Score (PMS) values (5.48 vs 3.43; p = 0.00461) and a significantly lower visual analogue scale (VAS) values (1.06 vs 1.94; p = 0.0399) for pain than ORIF in the unstable subtype.ConclusionAmong patients with Vancouver type B fractures, frail patients, such as those with worse scores for residential status and pre-injury mobility, had a high mortality rate. There was no significant difference in mortality between patients treated with ORIF and those treated with revision. However, in the unstable subtype, the PMS and VAS values at the final follow-up examination were significantly better in patients who received revision. Based on postoperative activities of daily life, we therefore recommend evision in instances when either treatment option is feasible.Cite this article: Bone Jt Open 2023;4(1):38–46.

Cemented polished tapered femoral stems (PTS) made of cobalt–chrome alloy (CoCr) are a known risk factor for periprosthetic fracture (PPF). The mechanical differences between CoCr-PTS and stainless-steel (SUS) PTS were investigated. CoCr stems having the same shape and surface roughness as the SUS Exeter® stem were manufactured and dynamic loading tests were performed on three each. Stem subsidence and the compressive force at the bone–cement interface were recorded. Tantalum balls were injected into the cement, and their movement was tracked to indicate cement movement. Stem motions in the cement were greater for the CoCr stems than for the SUS stems. In addition, although we found a significant positive correlation between stem subsidence and compressive force in all stems, CoCr stems generated a compressive force over three times higher than SUS stems at the bone–cement interface with the same stem subsidence (p < 0.01). The final stem subsidence amount and final force were greater in the CoCr group (p < 0.01), and the ratio of tantalum ball vertical distance to stem subsidence was significantly smaller for CoCr than for SUS (p < 0.01). CoCr stems appear to move more easily in cement than SUS stems, which might contribute to the increased occurrence of PPF with the use of CoCr-PTS. [ABSTRACT FROM AUTHOR]

Background: Recent studies indicate a decreased risk of periprosthetic femoral fractures (PFFs) in cementless total hip arthroplasty (THA) for short compared to straight stems. However, the results are still inconclusive. Therefore, we retrospectively investigated the rate of PFFs within the first year between cementless short and straight stem THA.Methods: A 1:1 propensity score matching of 3,053 THAs was performed. Two groups including 1,147 short stem THAs implanted through a minimally invasive antero-lateral approach and 1,147 straight stem THAs implanted through a transgluteal Hardinge approach were matched. The rates of PFFs and fracture patterns were compared between both stem types. Risk factors for PFFs were analyzed by multivariate regression analyses.Results: The overall rate of PFFs was 1.7% in short stem THA and 3.2% in straight stem THA (P = .015). Postoperatively detected Vancouver A fractures occurred significantly more often in straight stem THA (P = .002), while the occurrence Vancouver B fractures did not differ significantly (P = .563). The risk of PFFs was significantly increased for women in straight stem THA (Odds ratio (OR) 2.620; Confidence Interval (CI) 1.172-5.856; P = .019). Increasing age showed a significantly increased odds ratio in short stem (OR 1.103; CI 1.041-1.169, P < .001) and straight stem THA (OR 1.057; CI 1.014-1.101, P = .008).Conclusion: Short stem THA reduces Vancouver Type A PFFs in the trochanteric region compared to straight stem THA, while Vancouver Type B fractures are comparable. Increasing age is a significant risk factor for both stem types, while the risk for PFFs in women was only significantly increased in the straight stem group. [ABSTRACT FROM AUTHOR]

Aims: Periprosthetic hip fractures (PPFs) after total hip arthroplasty are difficult to treat. Therefore, it is important to identify modifiable risk factors such as stem selection to reduce the occurrence of PPFs. This study aimed to clarify differences in fracture torque, surface strain, and fracture type analysis between three different types of cemented stems. Methods: We conducted biomechanical testing of bone analogues using six cemented stems of three different types: collarless polished tapered (CPT) stem, Versys Advocate (Versys) stem, and Charnley-Marcel-Kerboull (CMK) stem. Experienced surgeons implanted each of these types of stems into six bone analogues, and the analogues were compressed and internally rotated until failure. Torque to fracture and fracture type were recorded. We also measured surface strain distribution using triaxial rosettes. Results: There was a significant difference in fracture torque between the three stem types (p = 0.036). Particularly, the median fracture torque for the CPT stem was significantly lower than that for the CMK stem (CPT vs CMK: 164.5 Nm vs 200.5 Nm; p = 0.046). The strain values for the CPT stem were higher than those for the other two stems at the most proximal site. The fracture pattern of the CPT and Versys stems was Vancouver type B, whereas that of the CMK stem was type C. Conclusion: Our study suggested that the cobalt-chromium alloy material, polished surface finish, acute-square proximal form, and the absence of a collar may be associated with lower fracture torque, which may be related to PPF. Cite this article: Bone Joint Res 2022;11(5):270–277.

While traditional metallic cerclage remains the primary method in clinical application, non-metallic cerclage systems have recently gained popularity due to low risks of soft tissue irritation and bone intrusion. The objective of this study was to assess the performance of a novel non-metallic suture-based cerclage in comparison to traditional metallic cerclage cables for fixation of periprosthetic femoral fractures. An extended trochanteric osteotomy was performed on eight pairs of cadaveric femora, followed by reduction using either metallic cerclages (Group I) or the suture-based cerclage (Group II). A modular tapered fluted stem was then implanted in each specimen. The fragment translation during canal preparation and stem implantation was quantified using laser-scanning. Subsequently, each specimen underwent 500 cycles of multiaxial loading, with fragment translation and stem subsidence measured using a motion capture system. Following stem implantation, specimens in Group II exhibited a significantly greater lateral fragment translation (466 μm vs 754 μm, p = 0.017). However, there were no significant differences in anterior and distal translation between groups (p > 0.05). During multiaxial loading, the average stem subsidence in Group I was 0.36 mm (range, 0.04–1.42 mm), compared to 0.41 mm (range, 0.03–1.29) in Group II (p > 0.05). No significant difference was found in fragment translations between the two groups (p > 0.05). The suture-based cerclage system exhibited comparable biomechanical performance in fixation stability to conventional metallic cerclage cables. Yet, it was associated with a larger residual lateral gap between the fragments following stem implantation. Ultimately, the choice of fixation method should account for multiple factors, including patient characteristics, surgeon preference, and bone quality. • The suture-based cerclage had comparable performance to traditional metallic cables. • There was gaping in the suture cerclage group following stem impaction. • Stem subsidence after multiaxial loading was comparable between the two groups. • There was no significant difference in fragment translations between the two groups. [ABSTRACT FROM AUTHOR]

Objectives: As currently there is no existing biomechanical work on the topic of interest, the aim of the current study was to investigate the effect of cerclage banding distally to an intraoperatively occurring proximal periprosthetic femoral clamshell fracture versus a non-fractured femur after total hip arthroplasty. Methods: A diaphyseal anchoring stem was implanted in twenty paired human cadaveric femora, assigned to a treatment and a control group. In the treatment group, each specimen was fitted with a cerclage band placed 3 mm distally to a clamshell fracture, created with an extent of 40% of the anchoring length of the stem. The resulting fragment was not treated further. The contralateral specimens were left with the stems without further fracture creation or treatment. All constructs were tested under progressively increasing cyclic axial loading until failure. Relative bone-implant movements were monitored by motion tracking. Results: Number of cycles and the corresponding load at stem loosening, defined as 1 mm displacement of the stem along the shaft axis, were 31,417 ± 8870 and 3641.7 ± 887 N in the control group, and 26,944 ± 11,706 and 3194.4 ± 1170.6 N in the treatment group, respectively, with no significant differences between them, p = 0.106. Conclusion: From a biomechanical perspective, cerclage banding distally to an intraoperative clamshell fracture with an extent of 40% of the anchoring length of the stem demonstrated comparable resistance against hip stem loosening versus a non-fractured femur. It may therefore represent a valid treatment option to restore the full axial stability of a diaphyseal anchoring stem. In addition, it may be considered to keep the medial wall fragment unfixed, thus saving operative time and minimizing associated risks.

Purpose: Periprosthetic (PPFF) and peri-implant femoral fractures (PIFFs) are troublesome complications of prosthetic and implant surgery, the prior being described to have a greater delay to surgery when compared with standard hip fractures. The implications of PPFF delay being disputed in the current literature and those of PIFF have not been investigated. The aim of this study was to determine whether the time from radiological examination to surgery differs between hip fractures and PPFF/PIFF, and the possible consequences of delay and group affiliation on morbidity, mortality, and readmissions., Methods: One hundred and thirty-six participants were admitted to Danderyd hospital during 2020, cases exposed to PPFF or PIFF ( n  = 35) and hip fracture controls ( n  = 101) matched at 1:3 with respect to age and sex. Timestamps from radiology, surgery, and death were retrieved from the Swedish fracture registry, data on adverse events (AEs), and readmissions were collected through retrospective medical record review for 90-days postsurgery., Results: Linear regression showed that time to surgery differed in case and control cohorts by a mean of 24.8 h, p  < 0.001, and AEs were significantly more common in cases, p  = 0.046. Unadjusted binary logistic regression indicated a possible relationship between time to surgery increasing the rate of AEs by 1.3% per hour of delay, 95% confidence interval [CI]: (1-1.03)., Conclusion: This study reveals a significant delay in surgery for PPFFs and PIFFs compared with standard hip fractures, leading to higher adverse event rates. While mortality and readmissions did not differ significantly, the delay underscores the need for timely intervention in these complex cases. Further research is needed to address these challenges and improve patient outcomes., Level of Evidence: III., Competing Interests: The authors declare no conflict of interest., (© 2024 The Author(s). Journal of Experimental Orthopaedics published by John Wiley & Sons Ltd on behalf of European Society of Sports Traumatology, Knee Surgery and Arthroscopy.)

Objectives To determine the potential risk factors for intraoperative periprosthetic femoral fractures in patients with developmental dysplasia of the hip (DDH) undergoing total hip arthroplasty (THA). Methods This was a retrospective study. Patients who were diagnosed with DDH and undergoing THA (by artificial joint replacement) at our hospital from January 1999 to December 2019 were included in this study. Clinical and radiological factors were obtained from their medical records, such as age, sex, Crowe classification, morphological features of proximal femur, and features of surgical procedure. The outcome of interest was the occurrence of intraoperative periprosthetic femoral fracture, which was recorded and classified according to the Vancouver classification system. According to the fracture status, the patients were divided into two groups: the fracture group and the non‐fracture group. Multivariate logistic regression model was built to identify the risk factors for these fractures. Results A total of 1252 hips were finally included. Intraoperative periprosthetic femoral fractures were identified in 62 hips. The incidence of intraoperative periprosthetic femoral fractures in patients with DDH undergoing THA was 4.95%. There were 22 patients (proportion = 35.48%, incidence = 1.76%) with Type A fractures, 38 (proportion = 61.29%, incidence = 3.04%) with Type B fractures, and two (proportion = 3.23%, incidence = 0.16%) with Type C fractures. Six independent risk factors for intraoperative periprosthetic femoral fractures were identified: osteoporosis (OR = 3.434; 95% CI, 1.963–6.007), previous surgical history (OR = 4.797; 95% CI, 2.446–9.410), Dorr Type A canal (OR = 3.025; 95% CI, 1.594–5.738), retained femoral neck length (OR = 1.121; 95% CI, 1.043–1.204), implanted metaphyseal‐diaphyseal fixation stems (OR = 3.208; 95% CI, 1.562–6.591), and implanted stem with anteversion design (OR = 2.916; 95% CI, 1.473–5.770). Conclusions The overall incidence of intraoperative periprosthetic femoral fractures in patients with DDH undergoing THA was 4.95%, which was at a moderate level compared to patients with other diseases undergoing THA. Six independent risk factors were identified: osteoporosis, previous surgical history, Dorr Type A canal, insufficient neck osteotomy level, implantation of metaphyseal‐diaphyseal fixation stem, and implantation of a stem with an anteversion design. Comprehending these risk factors might help surgeons prevent the occurrence of these intraoperative periprosthetic femoral fractures in patients with DDH.

Cemented polished tapered femoral stems (PTS) made of cobalt–chrome alloy (CoCr) are a known risk factor for periprosthetic fracture (PPF). The mechanical differences between CoCr-PTS and stainless-steel (SUS) PTS were investigated. CoCr stems having the same shape and surface roughness as the SUS Exeter® stem were manufactured and dynamic loading tests were performed on three each. Stem subsidence and the compressive force at the bone–cement interface were recorded. Tantalum balls were injected into the cement, and their movement was tracked to indicate cement movement. Stem motions in the cement were greater for the CoCr stems than for the SUS stems. In addition, although we found a significant positive correlation between stem subsidence and compressive force in all stems, CoCr stems generated a compressive force over three times higher than SUS stems at the bone–cement interface with the same stem subsidence (p < 0.01). The final stem subsidence amount and final force were greater in the CoCr group (p < 0.01), and the ratio of tantalum ball vertical distance to stem subsidence was significantly smaller for CoCr than for SUS (p < 0.01). CoCr stems appear to move more easily in cement than SUS stems, which might contribute to the increased occurrence of PPF with the use of CoCr-PTS.

Introduction and Aim Periprosthetic femoral fractures (PFF) represent an increasing clinical and economic burden. This study aims to determine the optimal configuration of a bridge-combined internal fixation system in the treatment of Vancouver type B1 PFF, using finite element analysis. Materials and methods A three-rod ortho-bridge system (OBS) fixation model was used to evaluate the optimal configuration of four target parameters: position of the third rod; intersection angle between the proximal screws; connecting rod diameter; and number of screws used. Femoral displacement and the maximum von Mises stress of the OBS were used as the evaluation indices, to analyze the PFF and to determine the optimal use of an OBS. For each parameter, various candidate options were tested. Results Finite element analysis revealed that the rate of femoral displacement and the maximum von Mises stress of the OBS were at a minimum when there was a 35 mm downward movement of the third rod from the baseline. Therefore, the optimal position of third rod fixation was 35 mm below the fovea capitis of the femur. The optimal intersection angles between the proximal screws were found to be 71.92° or 84°. A 6 mm diameter connecting rod proved to be most effective. Configuration d, utilizing 7 screws, represented the most clinically appropriate screw number configuration, despite configuration f, utilizing 9 screws, eliciting the best evaluation indices. Conclusion An OBS used in the above-described configuration is well suited to the characteristics of PFF and provides an effective and reliable means for their treatment. [ABSTRACT FROM AUTHOR]

OBJECTIVE: Periprosthetic femoral fractures (PFF) are a serious complication in patients who have undergone hip arthroplasty. Some authors consider revision arthroplasty as the gold standard in the surgical treatment of Vancouver type B2 and B3 PFF. Others, however, prefer treating PFF by open reduction and internal fixation (ORIF), without revising loose stems, especially in elderly patients. In the present retrospective study, we report mid/long-term results in a series of patients affected by B2 or B3 PFF surgically treated by ORIF, using a locking compression plate (LCP), thus avoiding the need of revision arthroplasty. MATERIALS AND METHODS: We reviewed 28 patients affected by B2 or B3 PFF surgically treated between 2010 and 2017 by ORIF using a LCP, after an average follow-up of 5.5 years. The average age of the patients at diagnosis was 78 years; in 17 patients, the femoral stem was uncemented while in 11, cemented. The mean interval time between hip arthroplasty and PFF was 6.7 years. Clinical results were assessed using Harris Hip Score (HHS), while radiographic results according to Beals and Tower criteria. RESULTS: At follow-up, HHS ranged from 72 to 96 points; 8 patients had an excellent result, 12 got a good result and 8 a fair result. According to Beals and Tower criteria, all the radiographic results were excellent (9 patients) or good (19 patients). The majority of our patients returned to their previous ambulatory levels. CONCLUSIONS: According to our results, in elderly patients affected by Vancouver type B2 or B3 PFF, surgical treatment by ORIF using a locking compression plate, without a stem revision, seems to be associated with satisfactory outcome. [ABSTRACT FROM AUTHOR]

Periprosthetic femoral fractures are a serious complication after total hip arthroplasty. The Vancouver classification divides fractures on location, implant stability and residual bone stock. The treatment of Vancouver B fractures is surgical and the first decision point surrounds whether or not the stem is well-fixed: well-fixed stems require Open Reduction and Internal Fixation, whereas loose stems require revision arthroplasty. Vancouver B1 fractures are treated with ORIF and had a poorer out¬come when compared with B2 and B3 fractures because some B1 fractures were, in reality, probably B2 fractures. In Vancouver B2 and B3 fractures, the stem is loose and the revision of implant is mandatory. Controversy remains around the indications to perform ORIF or revision for Vancouver B fracture. In the future, it could be useful to combine infor¬mation from both the radiographs and the medical records in order to be able to more correctly evaluate the type of fracture and its treatment.

Abstract Background The incidence of fractures around the femoral prosthesis among patients undergoing hip arthroplasty is increasing and has become the third leading cause of hip revision. While numerous methods for the surgical treatment of periprosthetic femoral fractures (PFFs) have been proposed, only few reports have examined the long-term efficacy of surgical treatment. This study aims to examine the mid-and long-term efficacy of surgical treatment among patients with Vancouver B2 and B3 PFFs. Methods This retrospective study evaluated the surgical outcomes of patients with Vancouver B2 and B3 PFFs between 2007 and 2011. The minimum follow-up time was eight years. Fracture healing, prosthesis stability, complications, patient quality of life SF-36 score, and survival rate were evaluated during the follow-up assessments. Results A total of 83 patients were included and had an average follow-up period of 120.3 months. Among these patients, 69 were classified as Vancouver B2 and were treated with a distal fixation stem, whereas 14 cases were classified as Vancouver B3 and were treated with modular femoral prosthesis by using a proximal femoral allograft technique. A total of 15 patients underwent secondary revision surgery, and prosthesis dislocation was identified as the main cause of secondary revision. 80 (96.4%) cases of fractures were clinically healed. The mortality rate in the first year after surgery was 8.4% (7/83). The overall 5-year Kaplan–Meier survival rate for these patients was 75.9%. Meanwhile, the 5-year Kaplan–Meier survival rate for the implants was 86.9%. The final follow-up SF-36 score of the patients was 48.3 ± 9.8. Conclusions Patients with Vancouver B2 and B3 PFFs show high mortality in the first year after their surgery, and the Kaplan–Meier analysis results showed that such mortality tends to plateau after 5 years. Prosthesis dislocation was identified as the primary cause of secondary revision.

Introduction: Periprosthetic fractures of the femur are an increasing problem in today's trauma and orthopaedic surgery. Owing to the hip stem, implant anchorage is very difficult in the proximal femur. This study compares two plate systems regarding their biomechanical properties and the handling in periprosthetic fracture fixation of the proximal femur. Materials and methods: Using eight pairs of fresh, frozen human proximal femora the Locking Compression Plate/Locking Attachment Plate construct (LCP/LAP) (group I, DePuy Synthes) was compared to the new LOQTEQ® periprosthetic distal lateral femur plate (group II, AAP Implantate AG). After implantation of press fit femoral hip stems a Vancouver B1 fracture model was used. Biomechanical testing was performed by cyclic axial loading with a constant increment of 0.1 N/cycle starting from 750 N axial loading. Every 250 cycles an a.p. x-ray was done to evaluate failure. Results: The Group II showed significant higher axial stiffness (+42%) compared with Group I. In addition, Group II withstood significantly more load-cycles until failure (20%). The mode of catastrophic failure was plate breakage in Group II, whereas, in Group I, all plates showed an early bending followed by plate breakage. Discussion and conclusion: Both plate systems enable screw placement around hip stems. The hinge plate showed superior biomechanical results compared with the locking compression plate/locking attachment plate construct. Furthermore, the hinge plate offers variable hinges and variable angel locking making bicortical screw placement around hip stems more comfortable and safe. The translational potential of this article: The results of this study can be directly transferred to patient care. With the innovative hinge plate, the surgeon has a biomechanically superior implant, which also offers improved options for screw placement compared to a standard locking plate.

Abstract Background Periprosthetic femoral fracture is identified as the third most frequent reason for revision total hip arthroplasty (THA). Treatment of periprosthetic fractures of the femur after THA remains a surgical challenge. In this report, we presented 2 patients with periprosthetic proximal femur fracture variant (a fracture of the greater trochanter with lateral cortical extension) and femoral stem destabilization. Cases presentation Two patients presented with chief complaints of pain in hip, restricted hip movements and gait changes. On the basis of clinicoradiological findings, the patients were diagnosed as pseudo AGT periprosthetic fracture, since the stem was loosened. They underwent open reduction and internal fixation (ORIF) with cables. After 2 years of follow-up, the 2 patients had favorable clinical outcomes after operation. Both lower limbs of the 2 patients were of equal length. The Harris score of the two hips was 96 and 94, respectively. Conclusion CT scan worked better than X-ray examination in the diagnosis of prosthetic looseness with this type of fracture. Compared to longer-stem revision, ORIF with cables could also achieve good result with these fractures.

Objective To explore the efficacy and safety of intravenous tranexamic acid for reducing perioperative blood loss and allogeneic blood transfusions in revision surgery for Vancouver type B periprosthetic femoral fractures after total hip arthroplasty (THA). Methods We retrospectively reviewed 129 patients who underwent revision surgeries because of Vancouver type B periprosthetic femoral fractures from January 2008 to September 2018. Patients were divided into two groups according to whether they received intravenous tranexamic acid (n = 72) or not (n = 57). The two groups were compared in terms of estimated intraoperative blood loss, visible blood loss, hidden blood loss, the volume of allogeneic blood transfusion and the incidence of symptomatic venous thromboembolism (VTE). Patients were also compared depending on the Vancouver classification (Vancouver type B1, B2, and B3). Results Regardless of the subtype of Vancouver classification, patients who received tranexamic acid showed significantly lower estimated intraoperative blood loss, visible blood loss, hidden blood loss, and allogeneic blood transfusion volume. Use of tranexamic acid was not associated with significant changes in the incidence of postoperative symptomatic VTE. Similar results were obtained with subgroups of patients who had the Vancouver type B1, B2, or B3 periprosthetic femoral fractures. Conclusions The administration of intravenous tranexamic acid can safely and effectively reduce perioperative blood loss and allogeneic blood transfusions in revision surgery for Vancouver type B periprosthetic femoral fractures, without increasing the risk of symptomatic VTE.

Objectives: To determine the potential risk factors for intraoperative periprosthetic femoral fractures in patients with developmental dysplasia of the hip (DDH) undergoing total hip arthroplasty (THA). Methods: This was a retrospective study. Patients who were diagnosed with DDH and undergoing THA (by artificial joint replacement) at our hospital from January 1999 to December 2019 were included in this study. Clinical and radiological factors were obtained from their medical records, such as age, sex, Crowe classification, morphological features of proximal femur, and features of surgical procedure. The outcome of interest was the occurrence of intraoperative periprosthetic femoral fracture, which was recorded and classified according to the Vancouver classification system. According to the fracture status, the patients were divided into two groups: the fracture group and the non‐fracture group. Multivariate logistic regression model was built to identify the risk factors for these fractures. Results: A total of 1252 hips were finally included. Intraoperative periprosthetic femoral fractures were identified in 62 hips. The incidence of intraoperative periprosthetic femoral fractures in patients with DDH undergoing THA was 4.95%. There were 22 patients (proportion = 35.48%, incidence = 1.76%) with Type A fractures, 38 (proportion = 61.29%, incidence = 3.04%) with Type B fractures, and two (proportion = 3.23%, incidence = 0.16%) with Type C fractures. Six independent risk factors for intraoperative periprosthetic femoral fractures were identified: osteoporosis (OR = 3.434; 95% CI, 1.963–6.007), previous surgical history (OR = 4.797; 95% CI, 2.446–9.410), Dorr Type A canal (OR = 3.025; 95% CI, 1.594–5.738), retained femoral neck length (OR = 1.121; 95% CI, 1.043–1.204), implanted metaphyseal‐diaphyseal fixation stems (OR = 3.208; 95% CI, 1.562–6.591), and implanted stem with anteversion design (OR = 2.916; 95% CI, 1.473–5.770). Conclusions: The overall incidence of intraoperative periprosthetic femoral fractures in patients with DDH undergoing THA was 4.95%, which was at a moderate level compared to patients with other diseases undergoing THA. Six independent risk factors were identified: osteoporosis, previous surgical history, Dorr Type A canal, insufficient neck osteotomy level, implantation of metaphyseal‐diaphyseal fixation stem, and implantation of a stem with an anteversion design. Comprehending these risk factors might help surgeons prevent the occurrence of these intraoperative periprosthetic femoral fractures in patients with DDH. [ABSTRACT FROM AUTHOR]

Aims: One of the instruments in the orthopaedic surgeon's armamentarium to face the challenges associated with periprosthetic fracture around the stem of a hip replacement is the tapered, fluted, modular, titanium (TFMT) stem. Our aim was to study its clinical and radiological outcomes. Patients and Methods: During the period 2010–2016 86 patients (55 females; median age 78.2 years; mean BMI 26.3 kg/m2; median ASA classification 2) underwent 87 revisions for a Vancouver B periprosthetic fracture using a Stryker Restoration Cone-Conical stem. Results: After a median follow-up of 2.9 years no stem had to be revised and no case of stem fracture was found. Dislocation was the most common complication and occurred in 18% of patients. Other major complications were deep infection (n = 4), subsidence >5 mm (n = 7), and nonunion (n = 5). 3-month and 1-year mortality was 10% and 15% respectively and was strongly correlated with age, deep infection, and ASA classification. The median EQ-5D health state index at final follow-up was 0.78 and all patients were ambulatory. Conclusions: The complication most commonly encountered was dislocation and can likely be prevented by the use of large heads, adequate reduction and fixation of the trochanteric area and restoration of the native anatomy. Contrary to previous concerns, fracture and subsidence of these modular stems do not appear to be a significant problem in this geriatric population. [ABSTRACT FROM AUTHOR]

Background: The aim of this study is to investigate the population and primary total hip arthroplasty (THA)-based incidences, fracture types, complications, and survival of operatively treated periprosthetic femoral fracture (PFF).Methods: This retrospective study reviewed 202 cases of operatively treated PFFs in a study period from January 2004 to December 2016. The Vancouver classification was used to classify PFFs.Results: The incidence of PFF related to 1000 primary THAs per year was 2.7 (standard deviation 1.0, range 0.9-4.5) at a defined hospital district area during the study period. The mean population-based incidence of operatively treated PFFs raised from 1.6 to 4.5 per 100,000 person-years during the study period. The B1-type fracture was the most common fracture type in 71 of 202 (35%) of these PFFs. The cumulative incidence of re-revision was 10.9% at 1 year and 15.6% at 15 years (95% confidence interval [CI] 10.9-21.0). The cumulative incidence for other major complications was 6.4% at 1 year and 9.9% at 15 years (95% CI 5.9-15.0). The cumulative incidence of death after PFF was 7.4% at 1 year and 56.3% at 15 years (95% CI 41.3-68.8) during the follow-up time from January 1, 2004 to December 31, 2019.Conclusion: This country-specific study showed a 3-fold increasing trend in the incidence of operatively treated PFFs from 2004 to 2016 per 1000 THAs. The Vancouver type B1 fracture was the most common type. A high number of complications were associated with PFFs and 7.4% of the patients had died within 1 year after PFF surgery. [ABSTRACT FROM AUTHOR]

Background: Total hip replacement (THR) after failed internal fixation of intertrochanteric femoral fractures is challenging. The aim of this study is to show the reliability of using standard cemented femoral stems in this operation.Methods: This work included 107 THRs performed in 107 patients after failed treatment of intertrochanteric femoral fractures. The etiology of failure included 67 cases of failure of fixation, 16 cases of nonunion, 15 cases of avascular necrosis, and 9 cases of post-traumatic osteoarthritis. There were 48 males and 59 females. The mean age was 66 years (range 58-81). Failed dynamic hip screws were removed at the time of THR, and the screw holes were blocked with cement. All cases had cemented standard stem femoral prostheses.Results: At an average 7.4 years with a minimum of 5 years of follow-up, 102 cases had good clinical and radiological outcomes and 5 cases had fair outcomes. One patient was infected and required 2 stages of revision arthroplasty. Two cases had intraoperative proximal femoral crack, and were treated by cerclage wires. Two patients had early postoperative dislocations. No patients had late periprosthetic femoral fractures or implant loosening.Conclusion: Standard cemented femoral stems are reliable and cost-effective prostheses in such cases. It is not necessary to bypass the distal screw hole by doubling the femoral canal diameter as long as the bone holes are covered by cement. [ABSTRACT FROM AUTHOR]

Objective: To explore the efficacy and safety of intravenous tranexamic acid for reducing perioperative blood loss and allogeneic blood transfusions in revision surgery for Vancouver type B periprosthetic femoral fractures after total hip arthroplasty (THA). Methods: We retrospectively reviewed 129 patients who underwent revision surgeries because of Vancouver type B periprosthetic femoral fractures from January 2008 to September 2018. Patients were divided into two groups according to whether they received intravenous tranexamic acid (n = 72) or not (n = 57). The two groups were compared in terms of estimated intraoperative blood loss, visible blood loss, hidden blood loss, the volume of allogeneic blood transfusion and the incidence of symptomatic venous thromboembolism (VTE). Patients were also compared depending on the Vancouver classification (Vancouver type B1, B2, and B3). Results: Regardless of the subtype of Vancouver classification, patients who received tranexamic acid showed significantly lower estimated intraoperative blood loss, visible blood loss, hidden blood loss, and allogeneic blood transfusion volume. Use of tranexamic acid was not associated with significant changes in the incidence of postoperative symptomatic VTE. Similar results were obtained with subgroups of patients who had the Vancouver type B1, B2, or B3 periprosthetic femoral fractures. Conclusions: The administration of intravenous tranexamic acid can safely and effectively reduce perioperative blood loss and allogeneic blood transfusions in revision surgery for Vancouver type B periprosthetic femoral fractures, without increasing the risk of symptomatic VTE. [ABSTRACT FROM AUTHOR]

Periprosthetic fractures are a growing concern due to the increasing frequency of primary joint replacement surgery, with total hip arthroplasty being the most common. The incidence of periprosthetic fractures after revision surgery ranges from 4 to 11 %, with up to 30 % reported after knee revision surgery. This case report aims to describe the treatment of an 81-year-old woman suffering from neglected periprosthetic femoral fracture post hemiarthroplasty. An 81-year-old woman with a history of hemiarthroplasty surgery and hypertension was admitted to the ER with pain in her right thigh. She had a middle shaft femoral fracture and was scheduled for open reduction and internal fixation. Despite being fully conscious and having an average pulse rate and blood pressure, she had cardiomegaly and congestive pulmonum. Unfortunately, this patient did not receive appropriate medical treatment after it occurred for 1 month. After surgery, we evaluated the implant, and the implant stabilized the fracture. After 1–3 months after surgery, the LEFS (The Lower Extremity Functional Scale) score was found that the score increase significantly after surgery. The Vancouver classification system manages periprosthetic fractures by assessing location, stability, and bone quality. Type A fractures involve the trochanter, while type B fractures are diaphyseal and can extend distally. ORIF is used for subtype B1 fractures, but newer techniques offer shorter operating times and fewer complications. From this study, we can conclude that even though neglected cases procedure with ORIF promises a good outcome based on clinical evaluation. • Treating neglected cases procedure with ORIF promises a good outcome based on clinical evaluation. • Before choosing ORIF as a treatment, it is imperative to categorize the fracture type using the Vancouver classification. • ORIF has been proven to have shorter operating and anesthetic time, fewer blood transfusions, and fewer complications. [ABSTRACT FROM AUTHOR]

Osteopetrosis is an inherited disorder characterized by increased bone density and brittle bone quality. Degenerative changes often occur after the age of 40 in patients with osteopetrosis. Operative intervention is the primary treatment option if the clinical manifestation of secondary osteoarthritis is severe. A 44-year-old male suffering autosomal dominant osteopetrosis and progressive unilateral hip osteoarthritis required a total hip arthroplasty. However, there were several technical challenges associated with this procedure including creating a femoral medullary canal and developing a Vancouver type B2 periprosthetic femoral fracture postoperatively. To afford some experience for the management of similar cases, we here present our technical solutions to these problems.

Th e rate of periprosthetic femoral fractures following total hip replacement has been growing steadily in the last 20 years and ranges from 0.1% to 2.1%. These fractures are mostly related to older patients with the presence of chronic diseases and frequently poor bone quality. Th e treatment is surgically very complex and demanding, followed by a series of complications. Th e evaluation in this retrospective study included 23 patients who were medically treated from January 2004 to December 2015 with the mean follow-up of 14.5 (range, 9-25) months. Th ere were 17 patients with cement total hip arthroplasty (THA) and 6 with cementless THA. During treatment of fractures, different techniques were implemented including the use of wire cerclage, dynamic compression plates (DCP), a locking compression plate (LCP) system, and long revision stem. For the purpose of distinguishing fractures, we used the Vancouver classifi cation by Duncan and Masri. For clinical evaluation, we used the modifi ed Merle d’Aubigne score system and monitored complications during treatment. Th e aim is to show treatment results of the type B periprosthetic femoral fractures by using diff erent operative treatment techniques. According to the Vancouver classifi cation within type B, 10 (43.47%) patients had type B1 fractures, another 10 (43.47%) patients had type B2 fractures, and three (13.04%) patients had type B3 fractures. According to gender distribution, there were eight (34.8%) male and 15 (65.2%) female patients, mean age 59.5 (range, 47-86) years. Twelve (52.2%) and 11 (47.8%) patients had left- and right-sided fractures, respectively. Th e mean length of hospital stay was 16 (range, 9-26) days. According to the Merle d’Aubigne score system, 10 patients with type B1 fractures had the mean score of 11.5 points, which is poor result. Poor result was also recorded in patients with type B2 fractures, with the mean score of 10.6 points. Th e three patients with type B3 fractures had the mean score of 12 points, which is considered fair score. In conclusion, Vancouver classifi cation has been widely accepted and using the protocols makes decision making during treatment much easier. During treatment of this type of fracture, we used various implants, wire cerclage, DCP and LCP, as well as long stem revision. In certain cases, we applied surgical techniques, implants that are not recommended by the Vancouver protocol by which we treated periprosthetic femoral fractures; in these case, we recorded nonunion bone, malunion and breaking of implants, which resulted in poor treatment outcome.

Periprosthetic femoral fractures (PPFF) around total hip arthroplasty (THA) are one of the leading causes of hip revision. High mortality rates are observed after revision in case of PPFF around THA. To modify risk factors, early postoperative mobilization is necessary. Permissive weight bearing (PWB) is designed to optimize clinical recovery in aftercare. This study aimed to perform a scoping review to summarize the current available evidence on postoperative weight bearing in late PPFF around THA and the implementation of PWB in aftercare. A systematic search was performed on the Cochrane Library, Web of Science, Ovid MEDLINE, EMBASE, and CINAHL databases on January 26th, 2023. Articles were screened in two stages by two independent reviewers. Studies describing adult patients with a history of primary THA who were surgically treated for late PPFF and mentioning prescribed postoperative weight-bearing protocols with relevant outcome measures were included. Seven studies were included, reporting data on 22 patients (age range 47-97 years, BMI range 19-32 kg/m 2 , ASA classification range 2-3). No studies used PWB in aftercare. The non-weight-bearing group showed no complications. The restricted weight-bearing group had one death and one implant failure. The full weight-bearing group experienced one deep infection and one plate removal because of impingement. The main finding was that, after an extensive systematic search, no articles could be included focusing on PWB in patients with a late PPFF after THA. Addressing this gap in the literature is essential to advancing the understanding of postoperative weight-bearing protocols and PWB for late PPFF around THA., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2024, Vesseur et al.)

The increasing prevalence of periprosthetic femoral fractures, specifically in the vicinity of the hip, has emerged as a significant issue in recent times. Consequently, there is a need for a thorough examination to enhance the effectiveness of management and treatment approaches. The findings of this study emphasize a significant disparity in the occurrence and characteristics of these fractures, and the multiple cases have highlighted the efficacy of various treatment strategies, such as open reduction and internal fixation, as well as the utilization of cortical strut allografts. Furthermore, the study has identified potential risk factors that have an impact on the characteristics of fractures, providing valuable insights that could be crucial in the development of preventive strategies. This study provides a thorough examination of periprosthetic femoral fractures, highlighting the importance of a cohesive treatment algorithm to improve the handling of such fractures. Moreover, it promotes the need for a collaborative endeavor in conducting research in this field, cultivating a more profound comprehension that has the potential to drive progress in therapeutic approaches, ultimately enhancing patient results over an extended period of time. It is crucial that forthcoming research endeavors persist in expanding upon these discoveries, striving towards a unified methodology in tackling this substantial clinical obstacle., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2024, Cursaru et al.)

Background: Periprosthetic femoral fractures (PFFs) after total hip arthroplasty are devastating complications often resulting in functional limitations and increased mortality. The use of the direct anterior approach (DAA) is becoming more popular, and the number of revisions done through this interval is increasing. The DAA interval can be expanded to treat PFFs. This retrospective case series assessed outcomes of PFF patients treated with the extension of the DAA interval.Methods: The study contained 40 patients (40 hips). Mean patient age was 74.3 years (range, 55.1-92.2 years). Mean follow-up time was 50.4 months (range, 20-98.2 months). Fractures were classified as Vancouver B2 (n = 36) and B3 (n = 4).Results: Median cut-to-close time was 152 minutes (interquartile range: 80-279). There were five complications (12.5%): 2 deaths, 1 transient femoral nerve palsy, 1 fissure distal to the stem, and 1 hematoma.Conclusion: Expansion of the DAA interval to treat PFF showed similar results compared with other surgical approaches in terms of mortality, complications, fracture healing, and dislocation rate. These results indicate that femoral revision for PFF in the DAA interval is a safe and reliable procedure compared with other surgical approaches for the treatment of Vancouver B2 and B3 periprosthetic fractures. [ABSTRACT FROM AUTHOR]

Aims: This study was performed to evaluate the efficacy of reconstructing bone stock in Vancouver B3 periprosthetic femoral fractures (PFFs) using an impacted cancellous allograft cortical or combined with cortical strut allograft.Patients and Methods: We retrospectively assessed 39 Vancouver-type B3 periprosthetic fractures in 39 patients. Having different bone defects in the femur, 20 patients were treated with intramedullary impacted cancellous allograft, and 19 patients were treated with impacted cancellous allograft combined with cortical strut allograft. The median follow-up time was 58 months.Results: Thirty-three patients completed the follow-up as scheduled, and three of them underwent re-operation (9.1%, 3/33). The last evaluated mean hip Harris score was 81.8; WOMAC pain, stiffness, and function scores were 82.3, 79.0, and 81.3, respectively. The satisfaction score was 86.6, and the SF-12 mental and physical scores were 40.4 and 51.1, respectively, for all patients. These outcomes were without significant difference between the two treatment groups (p > 0.05). The facture union was achieved in all the hips (100%). The stem was fixed with bone ingrowth in 24 patients and with fibrous fixation in eight, while stem fixation was not achieved for the remaining patient. The stem subsided less than 3 mm in 23 patients and 3-5 mm in nine patients. One patient had > 5 mm subsidence. The femoral bone stock was improved in 18 patients and remained unchanged in 14 patients; only one patient suffered a diminished bone stock. The radiographic assessment outcomes exhibited little difference between the two treatment groups (p > 0.05). Osseous union of the cortical strut to the host femur occurred in six patients with partial union and ten with complete union. There was moderate and mild graft resorption in three and 13 hips, respectively.Conclusions: The use of impacted cancellous allograft and cortical strut allograft to reconstruct bone stock can provide reliable options and satisfactory results. [ABSTRACT FROM AUTHOR]

Background: The treatment of periprosthetic femoral fractures is a great challenge for the orthopedic surgeon and requires a knowledge of bone fracture fixation as well as skills and experience in revision surgery. The aim of this retrospective study was to evaluate the functional and radiological outcomes of periprosthetic femoral fractures surgically treated in our department from 2010 to 2016.Materials and methods: This study involved 73 patients with a periprosthetic femoral fracture after total hip arthroplasty or hemiarthroplasty. Periprosthetic femoral fractures were classified using the Vancouver system. Functional outcomes were assessed using Harris hip score, Palmer Parker score, SF-36 score and ambulatory status. Radiological findings were classified using Beals and Tower’s criteria.Results: The mean age of patients was 79.6 years old. Local risks factors were identified in 67% of the patients, principally osteoporosis (63.0%), followed by osteolysis (26.0%) and loosening of the stem (8.2%). According to the Vancouver classification, there were 10 type A, 49 type B and 14 type C fractures. Of the type B fractures, 26 were B1, 17 were B2 and 6 were B3. Applying Beals and Tower’s criteria, radiological results were excellent in 24 patients (32.9%), good in 35 (47.9%) and poor in 14 (19.2%). The mean Harris hip score post-operatively was 72.5.Conclusions: These kinds of fractures should be assessed individually and the optimal treatment plan should be made in accordance with the bone stock quality, stem stability, location of the fracture and patient expectations. [ABSTRACT FROM AUTHOR]

Introduction: The SOFCOT symposium (2005) on periprosthetic fractures of the femur (PFFs) highlighted a high rate of dislocation (15.6% at 6 months) after change of prosthesis. So far, no study has ever proved the benefit of dual-mobility articulation during PFFs revisions. We conducted a comparative study on two prospective cohorts in order to (1) assess the influence of systematic acetabular revision in favor of a double mobility on dislocation rate (2) and in order to evaluate the rate of morbidity associated with this extra surgical procedure. Hypothesis: A systematic replacement of the cup in favor of a dual-mobility articulation enables to reduce the dislocation rate in PFFs revisions without increasing morbidity. Methodology: We compared two prospective multicenter cohorts over a year (2005 and 2015) using the same methodology. Any fracture around hip prosthesis which occurred 3 months at least after surgery was included. Data collection was clinical and radiological on preoperative, intraoperative and 6 months after surgery. The 2015 'bipolar' group ( n = 24) included patients who had a bipolar revision (both femoral and dual-mobility articulation). The 2005 'unipolar' group ( n = 25) included patients who had only a femoral implant revision. Patients were comparable by age ( p = 0.36), sex ( p = 0.91), ASA score ( p = 0.36), history of prosthetic revision ( p = 1.00), Katz score ( p = 0.50) and the type of fracture according to the Vancouver classification ( p = 0.55). Results: There was a 4% rate of dislocation in the 'bipolar group' while there was 21% rate of dislocation in the 'unipolar group' (8% of recurrent dislocation) ( p = 0.19). The rate of all-cause complications 6 months after surgery was not significantly different ( p = 0.07): 12.5% in the 2015 'bipolar' cohort (one dislocation, one non-symptomatic cup migration and one pseudarthrosis of the major trochanter) versus 35% in the 'unipolar' cohort (5 dislocations, 1 major trochanter fracture and 1 femur pseudarthrosis, 1 secondary displacement associated with a superficial infection). The surgical revision after 6 months was not significantly different (1/23 or 4% vs. 4/25 or 16%, p = 0.35). Conclusion: We confirm the low rate of dislocations after fitting a dual-mobility cup in case of revision of the femoral side in case of periprosthetic femoral fracture, as well as the need for additional cases to be carried out upon further studies to significantly confirm the interest of preventing instability after femoral revision. [ABSTRACT FROM AUTHOR]

• The development of periprosthetic femoral fractures is influenced by hip stem design parameters. • Friction at the implant-bone interface increases the fracture load and even higher fracture loads are possible for surfaces that allow or induce osseointegration. • An undersized implant reduces fracture load considerably due to the smaller cross-sectional area of the implant and the consequently missing initial stability. • A longer stem length leads to an increase of fracture load but shows signs of causing stress shielding and implant loosening after implantation. • Subject specific finite element analyses offer the possibility to compare different implant designs and choose the most suitable implant geometry the individual patient. Due to the increasing number of periprosthetic femoral fractures (PFF), the optimisation of implant design gains importance. For the presented research a validated, subject specific finite element model of a human femur with an inlying total hip stem was used to compare the influence of different geometrical implant parameters on the development of PFF. The heterogeneous bone tissue was modelled on the basis of computed tomography scans. A ductile damage model with element deletion was applied to simulate bone fracture in a load case re-enacting a stumbling scenario. The results were compared in terms of fracture load, subsidence and fracture pattern to analyse the influence of friction at the implant-bone interface, implant size and stem length. The results showed that higher friction coefficients lead to an increase of fracture load. Also, the usage of an oversized implant has a negligible effect while an undersized implant reduces the fracture load by 48.9% for the investigated femur. Lastly, a higher fracture load was reached with an elongated stem, but the bending and change in fracture path indicate a more distal force transmission and subsequent stress shielding in the proximal femur. [ABSTRACT FROM AUTHOR]

Background: Surgical treatment has been invariably indicated for Vancouver type B periprosthetic femoral fractures (PFFs), which involve femoral diaphysis around stem. We evaluated the outcomes of nonoperative management in patients with minimally displaced type B PFFs around cementless stem.Methods: From October 2009 to March 2016, 60 type B PFFs were treated at 1 institution. Among them, 19 minimally (<5 mm) displaced PFFs (31.7%, 19/60), which occurred around cementless stems, were treated nonsurgically with use of teriparatide. There were 6 men and 13 women. The mean age was 77.9 years (range, 51-98 years) at the time of PFF. The femoral stem was stable (type B1) in 11 patients and unstable (type B2) in 8. Teriparatide was injected from 1 to 4 months (mean, 3.2 months). We evaluated time to radiologic union and union rate.Results: A successful union was obtained in 16 patients (89.5%, 17/19) at 2 to 6 months (mean, 3.5 months). The union rate was 100% (11/11) in type B1 fractures and 75% (6/8) in type B2 fractures.Conclusion: Our study showed that conservative treatment is feasible for the cases of type B1 minimally displaced periprosthetic fractures, and it may also be considered as an alternative option for type B2 minimally displaced periprosthetic fractures. [ABSTRACT FROM AUTHOR]

Introduction: Periprosthetic fractures are difficult to manage. Plating technique has been considered a reliable form of management of periprosthetic fractures with a well-fixed stem, but a dependable and stable method of plate fixation to the bone is lacking. This study reports the clinical results using a locking attachment plate (LAP) instead of cable fixation to fix locking plates to a periprosthetic femoral shaft fracture.Materials and Methods: Nineteen patients with periprosthetic femoral shaft fractures around well-fixed stemmed implants were studied between August 2012 and December 2014. Patients were followed up for at least 1 year postoperatively. Median age was 74 years (range 56-96 years). Fractures were classified according to the Unified Classification System, Vancouver classification, and Su classification.Procedure: Open reduction was performed under minimal incision and the locking plate was fixed to the lateral cortex of the femoral shaft. The part of the shaft without a stem was fixed to the plate using 5.0-mm locking screws, and the part with an underlying stem was fixed using 3.5-mm locking screws through the LAP instead of cables. Postoperatively, patients were managed using general principles for femoral shaft fractures.Results: Average follow-up was 16 months (range 12-36 months). All cases achieved fracture healing without loss of reduction. There were no cases of implant breakage or stem loosening at final follow-up. The average number of LAPs per fixation construct was 2.1 (range 1-4), and the average number of 3.5-mm locking screws through each LAP was 3.3 (range 2-4). The average value of plate screw density was 0.55 (range 0.37-0.8), and the average working length was four holes (range 2-8).Conclusions: Using the LAP to manage periprosthetic fractures with a well-fixed stem could obviate the need for cable around the stem area and yield acceptable outcomes. [ABSTRACT FROM AUTHOR]

Osteopetrosis is an inherited disorder characterized by increased bone density and brittle bone quality. Degenerative changes often occur after the age of 40 in patients with osteopetrosis. Operative intervention is the primary treatment option if the clinical manifestation of secondary osteoarthritis is severe. A 44-year-old male suffering autosomal dominant osteopetrosis and progressive unilateral hip osteoarthritis required a total hip arthroplasty. However, there were several technical challenges associated with this procedure including creating a femoral medullary canal and developing a Vancouver type B2 periprosthetic femoral fracture postoperatively. To afford some experience for the management of similar cases, we here present our technical solutions to these problems. [ABSTRACT FROM AUTHOR]

Background: Periprosthetic fracture following total hip arthroplasty is a significant problem faced by hip surgeons, and its management in elderly patients remains a considerable challenge.Methods: We retrospectively reviewed 28 Vancouver B2 and B3 periprosthetic femoral fractures (PFF) treated with revision of the femoral stems by distally locked, hydroxyapatite-coated uncemented stems (Cannulok). Patients were aged 75 years or older at the time of surgery.Results: The mean follow-up was 44.6 months (range, 24-102). The mean postoperative Oxford hip score was 30.1 (range, 10-46). The rate of fracture union was 95.8%, and the survivorship of the stem was 100% at the end of follow-up.Conclusion: The management of PFF in elderly is associated with increased postoperative morbidity and mortality. The use of a distally locked, hydroxyapatite-coated femoral stem is a valid option for the treatment of PFF to achieve fracture union with a low rate of revision. [ABSTRACT FROM AUTHOR]

Introduction: Permissive weight bearing (PWB) has relatively recently been implemented to optimize rapid clinical recovery and restoration of function in patients suffering lower extremity fractures. PWB shows outcome advantages in this patient category. Currently, there are no decisive recommendations on postoperative load-bearing management after surgically treated periprosthetic femoral fractures (PPFF) around hip arthroplasty. The objective is to investigate the current postoperative practice of weight-bearing instructions for patients with surgically treated PPFF, accounting for differences in types of periprosthetic fractures and treatment options among Dutch orthopedic surgeons., Materials and Methods: An online survey was distributed among the members of the hip and trauma working groups of the Dutch Orthopedic Association., Results: The response rate was 13% (n=75). The main finding was that postoperative load bearing regimes in Vancouver A, B, and C PPFFs differed greatly among Dutch orthopedic surgeons, and there was no decisive guideline or consensus in postoperative load bearing regimes after surgically treated PPFF was used in the Netherlands., Conclusion: In the absence of decisive guidelines or consensus, more research is needed to explore the efficacy of PWB after surgically treated PPFF., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2023, Vesseur et al.)