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Your search keyword '"Bignozzi, Simone"' showing total 27 results
Start Over Author "Bignozzi, Simone" Journal knee surgery, sports traumatology, arthroscopy
27 results on '"Bignozzi, Simone"'

26. Three different cruciate-sacrificing TKA designs: minor intraoperative kinematic differences and negligible clinical differences.

Author

Zaffagnini, Stefano, Akkawi, Ibrahim, Marko, Tedi, Bruni, Danilo, Neri, Maria, Colle, Francesca, Marcacci, Maurilio, and Bignozzi, Simone

Subjects
TOTAL knee replacement, KINEMATICS, POSTERIOR cruciate ligament, FEMUR, RANGE of motion of joints
Abstract

Purpose: The goal of this study was to compare three types of mobile-bearing posterior cruciate ligament (PCL)-sacrificing TKA. The hypothesis was that the three designs provide differences in flexion stability and femoral rollback and improved clinical score at 2-year follow-up. Methods: Three groups of patients, divided according to implant design, were analysed retrospectively. All operations were guided by a non-image-based navigation system that recorded relative femoral and tibial positions in native and implanted knees during: passive range of motion and anterior drawer test at 90° flexion. WOMAC, KSS and SF36 scores were collected pre-operatively and at 2-year follow-up. Results: There are no differences in kinematic or clinical performance of the three implants, except for the antero-posterior translation during stress test in flexion: only Cohort B had comparable pre- and post-operative laxity test values ( p < 0.001). All three TKA designs allowed to maintain pre-operative tibial rotation pattern through all range of knee flexion. All clinical scores of the three patient cohorts were significantly improved post-operatively compared to the pre-operative values ( p < 0.001). Moreover, we found no differences among post-operative results of the three designs. Conclusion: Despite design variations, mobile-bearing PCL-sacrificing TKA reproduces femoral rollback and screw-home with little or no difference in clinical or functional scores at a follow-up of 2 years. Level of evidence: III. [ABSTRACT FROM AUTHOR]

Published
2014
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27. Deep-dished highly congruent tibial insert in CR-TKA does not prevent patellar tendon angle increase and patellar anterior translation

Author

Francesca Colle, Simone Bignozzi, Francesco Iacono, Ibrahim Akkawi, Danilo Bruni, Maurilio Marcacci, Giovanni Francesco Raspugli, Stefano Zaffagnini, Akkawi, Ibrahim, Colle, Francesca, Bruni, Danilo, Raspugli, Giovanni Francesco, Bignozzi, Simone, Zaffagnini, Stefano, Iacono, Francesco, and Marcacci, Maurilio

Subjects
Male, musculoskeletal diseases, Anterior patellar translation, medicine.medical_specialty, Clinical score, medicine.medical_treatment, Osteoarthritis, Patellar Ligament, medicine, Humans, Orthopedics and Sports Medicine, Prospective Studies, Range of Motion, Articular, Tibial insert, Arthroplasty, Replacement, Knee, Prospective cohort study, Aged, Aged, 80 and over, Orthodontics, business.industry, Patellar tendon angle, Patella, Anatomy, Middle Aged, musculoskeletal system, medicine.disease, Arthroplasty, Patellar tendon, Biomechanical Phenomena, Surgery, Computer-Assisted, Total knee arthroplasty, Orthopedic surgery, Female, Surgery, Knee Prosthesis, Range of motion, business, human activities, Follow-Up Studies
Abstract

PURPOSE: Starting from the hypothesis that a deep-dished highly congruent tibial insert in cruciate-retaining total knee arthroplasty would prevent the increase in patellar tendon angle and anterior patellar translation by reducing the paradoxical anterior femoral translation, the main purpose of the present study was to investigate the effect of this prosthesis design, and secondary to assess the clinical outcomes at 6-month follow-up. METHODS: Twenty patients treated with cruciate-retaining total knee arthroplasty with navigation technique were enrolled and prospectively followed up at 6 months. The median value of age was 71 years (57-83). Before and after surgery, the following parameters were calculated: patellar tendon angle, anterior-posterior and medio-lateral patellar translation, patellar height and range of motion. All patients were assessed with the SF-36 Physical Functioning and the Knee injury and Osteoarthritis Outcome Score ADL scores. RESULTS: Patellar tendon angle and anterior patellar translation significantly increased in post-operative conditions (p < 0.0001); a statistically significant medial patellar translation was found (p < 0.0001), while patellar height did not show any difference between pre- and post-operative conditions (n.s). A significant correlation was found between patellar tendon angle and anterior patellar translation and the clinical scores (p < 0.0417). There was a significant post-operative decrease (p < 0.0033) in the range of motion. CONCLUSIONS: The present study failed to demonstrate that deep-dished highly congruent tibial insert prevents the anterior translation of the patella in cruciate-retaining total knee arthroplasty, thus causing inferior clinical scores. It provided useful information about the biomechanical role of the patella in total knee arthroplasty, allowing to choose the most appropriate surgical approach. LEVEL OF EVIDENCE: Case series, Level IV.

Published
2014

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