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Background: Reconstruction of an osteoarthritic distal radioulnar joint (DRUJ) in patients with high physical demands and a long lifetime expectancy is challenging. A variety of methods like implant surgery and salvage procedures as partial or total ulnar head resection and the Sauve-Kapandji procedure are reasonable options in the elderly patient but not in young individuals since it often compromises manual power and stability and may cause impingement problems. Reconstruction of the DRUJ with rib perichondrium is a new treatment option with promising short-term outcome. The aim the present study was to investigate if the outcome is consistent over time. Methods: Four female patients with a mean age of 40.5 years suffered severe unilateral osteoarthritis in the DRUJ. They underwent reconstruction of the joint with rib perichondrium transplants. Preoperatively, mean pain under manual load was 8.5 (range 7-10) and 4.2 (range 2-5) at rest, using the visual analogue scale (VAS). Range of motion (ROM) in forearm rotation was on average 118 degrees and grip strength was 86% in comparison to the contralateral hand. The outcome was assessed at a clinical follow-up in 2016, measuring ROM, grip-strength, pain at rest and under manual load and DASH-score. Radiological examination was performed. An additional follow-up by letter was performed in 2021 using a patient-reported-outcome survey (PROS). The patients were asked to grade the ROM and grip-strength as changed or unchanged in comparison to the clinical follow-up in 2016. Results: At clinical follow-up at a mean of 3.1 years (range 1-5) after surgery, pain level had decreased to VAS 1.5 (0-5) under load and all patients were pain free at rest. Forearm rotation was on average 156 degrees (range 100-180) and grip strength was 97% of the unoperated hand. The mean DASH-score was 14.4 (0-45). An additional follow-up by letter was conducted at a mean of 7.5 years (5.5-9.5) after surgery. ROM and grip strength were reported as

Background: Reconstruction of an osteoarthritic distal radioulnar joint (DRUJ) in patients with high physical demands and a long lifetime expectancy is challenging. A variety of methods like implant surgery and salvage procedures as partial or total ulnar head resection and the Sauve-Kapandji procedure are reasonable options in the elderly patient but not in young individuals since it often compromises manual power and stability and may cause impingement problems. Reconstruction of the DRUJ with rib perichondrium is a new treatment option with promising short-term outcome. The aim the present study was to investigate if the outcome is consistent over time. Methods: Four female patients with a mean age of 40.5 years suffered severe unilateral osteoarthritis in the DRUJ. They underwent reconstruction of the joint with rib perichondrium transplants. Preoperatively, mean pain under manual load was 8.5 (range 7-10) and 4.2 (range 2-5) at rest, using the visual analogue scale (VAS). Range of motion (ROM) in forearm rotation was on average 118 degrees and grip strength was 86% in comparison to the contralateral hand. The outcome was assessed at a clinical follow-up in 2016, measuring ROM, grip-strength, pain at rest and under manual load and DASH-score. Radiological examination was performed. An additional follow-up by letter was performed in 2021 using a patient-reported-outcome survey (PROS). The patients were asked to grade the ROM and grip-strength as changed or unchanged in comparison to the clinical follow-up in 2016. Results: At clinical follow-up at a mean of 3.1 years (range 1-5) after surgery, pain level had decreased to VAS 1.5 (0-5) under load and all patients were pain free at rest. Forearm rotation was on average 156 degrees (range 100-180) and grip strength was 97% of the unoperated hand. The mean DASH-score was 14.4 (0-45). An additional follow-up by letter was conducted at a mean of 7.5 years (5.5-9.5) after surgery. ROM and grip strength were reported as

Background: Reconstruction of an osteoarthritic distal radioulnar joint (DRUJ) in patients with high physical demands and a long lifetime expectancy is challenging. A variety of methods like implant surgery and salvage procedures as partial or total ulnar head resection and the Sauve-Kapandji procedure are reasonable options in the elderly patient but not in young individuals since it often compromises manual power and stability and may cause impingement problems. Reconstruction of the DRUJ with rib perichondrium is a new treatment option with promising short-term outcome. The aim the present study was to investigate if the outcome is consistent over time. Methods: Four female patients with a mean age of 40.5 years suffered severe unilateral osteoarthritis in the DRUJ. They underwent reconstruction of the joint with rib perichondrium transplants. Preoperatively, mean pain under manual load was 8.5 (range 7-10) and 4.2 (range 2-5) at rest, using the visual analogue scale (VAS). Range of motion (ROM) in forearm rotation was on average 118 degrees and grip strength was 86% in comparison to the contralateral hand. The outcome was assessed at a clinical follow-up in 2016, measuring ROM, grip-strength, pain at rest and under manual load and DASH-score. Radiological examination was performed. An additional follow-up by letter was performed in 2021 using a patient-reported-outcome survey (PROS). The patients were asked to grade the ROM and grip-strength as changed or unchanged in comparison to the clinical follow-up in 2016. Results: At clinical follow-up at a mean of 3.1 years (range 1-5) after surgery, pain level had decreased to VAS 1.5 (0-5) under load and all patients were pain free at rest. Forearm rotation was on average 156 degrees (range 100-180) and grip strength was 97% of the unoperated hand. The mean DASH-score was 14.4 (0-45). An additional follow-up by letter was conducted at a mean of 7.5 years (5.5-9.5) after surgery. ROM and grip strength were reported as

Background: Reconstruction of an osteoarthritic distal radioulnar joint (DRUJ) in patients with high physical demands and a long lifetime expectancy is challenging. A variety of methods like implant surgery and salvage procedures as partial or total ulnar head resection and the Sauve-Kapandji procedure are reasonable options in the elderly patient but not in young individuals since it often compromises manual power and stability and may cause impingement problems. Reconstruction of the DRUJ with rib perichondrium is a new treatment option with promising short-term outcome. The aim the present study was to investigate if the outcome is consistent over time. Methods: Four female patients with a mean age of 40.5 years suffered severe unilateral osteoarthritis in the DRUJ. They underwent reconstruction of the joint with rib perichondrium transplants. Preoperatively, mean pain under manual load was 8.5 (range 7-10) and 4.2 (range 2-5) at rest, using the visual analogue scale (VAS). Range of motion (ROM) in forearm rotation was on average 118 degrees and grip strength was 86% in comparison to the contralateral hand. The outcome was assessed at a clinical follow-up in 2016, measuring ROM, grip-strength, pain at rest and under manual load and DASH-score. Radiological examination was performed. An additional follow-up by letter was performed in 2021 using a patient-reported-outcome survey (PROS). The patients were asked to grade the ROM and grip-strength as changed or unchanged in comparison to the clinical follow-up in 2016. Results: At clinical follow-up at a mean of 3.1 years (range 1-5) after surgery, pain level had decreased to VAS 1.5 (0-5) under load and all patients were pain free at rest. Forearm rotation was on average 156 degrees (range 100-180) and grip strength was 97% of the unoperated hand. The mean DASH-score was 14.4 (0-45). An additional follow-up by letter was conducted at a mean of 7.5 years (5.5-9.5) after surgery. ROM and grip strength were reported as

Background: Reconstruction of an osteoarthritic distal radioulnar joint (DRUJ) in patients with high physical demands and a long lifetime expectancy is challenging. A variety of methods like implant surgery and salvage procedures as partial or total ulnar head resection and the Sauve-Kapandji procedure are reasonable options in the elderly patient but not in young individuals since it often compromises manual power and stability and may cause impingement problems. Reconstruction of the DRUJ with rib perichondrium is a new treatment option with promising short-term outcome. The aim the present study was to investigate if the outcome is consistent over time. Methods: Four female patients with a mean age of 40.5 years suffered severe unilateral osteoarthritis in the DRUJ. They underwent reconstruction of the joint with rib perichondrium transplants. Preoperatively, mean pain under manual load was 8.5 (range 7-10) and 4.2 (range 2-5) at rest, using the visual analogue scale (VAS). Range of motion (ROM) in forearm rotation was on average 118 degrees and grip strength was 86% in comparison to the contralateral hand. The outcome was assessed at a clinical follow-up in 2016, measuring ROM, grip-strength, pain at rest and under manual load and DASH-score. Radiological examination was performed. An additional follow-up by letter was performed in 2021 using a patient-reported-outcome survey (PROS). The patients were asked to grade the ROM and grip-strength as changed or unchanged in comparison to the clinical follow-up in 2016. Results: At clinical follow-up at a mean of 3.1 years (range 1-5) after surgery, pain level had decreased to VAS 1.5 (0-5) under load and all patients were pain free at rest. Forearm rotation was on average 156 degrees (range 100-180) and grip strength was 97% of the unoperated hand. The mean DASH-score was 14.4 (0-45). An additional follow-up by letter was conducted at a mean of 7.5 years (5.5-9.5) after surgery. ROM and grip strength were reported as

Assessment of gene and protein expression in tissue sections is instrumental in medical research. However, this is often challenging to perform on skeletal tissues that require prolonged decalcification and have poor adhesion to slides. In this study, we optimized selected steps of in situ hybridization (ISH), immunohistochemistry (IHC), and immunofluorescence (IF) for formalin fixed and decalcified skeletal tissues. Sections from distal femur of 6-, 8- and 14-week-old rats injected with BrdU with or without a hemizygous eGFP transgene expressed under the control of a ubiquitous promotor were used. We report that proteinase K digestion is critical for the sensitivity of ISH, as concentrations that were too strong and too mild both resulted in loss of signal. In addition, intensified RNase A digestion removed nonspecific riboprobe-mRNA hybrids. Furthermore, enzymatic antigen retrieval using proteinase K provided more consistent results in IHC and can therefore be a useful alternative to heat induced epitope retrieval (HIER) for skeletal tissues where such treatment often damages the morphology. A mild proteinase K digestion also improved IF detection of GFP and worked well for double labeling IF of GFP and osteocalcin on frozen sections of formalin fixed and decalcified rat bones while maintaining morphology. In summary, this study provides strategies to improve protocols for enzymatic digestion in ISH, IHC, and IF for skeletal tissues and also demonstrates the importance of careful optimization and validation with the use of these techniques.

BackgroundThe aim of our study was to compare the long-term outcome after perichondrium transplantation and two-component surface replacement (SR) implants to the metacarpophalangeal (MCP) and the proximal interphalangeal (PIP) joints.MethodsWe evaluated 163 joints in 124 patients, divided into 138 SR implants in 102 patients and 25 perichondrium transplantations in 22 patients. Our primary outcome was any revision surgery of the index joint.ResultsThe median follow-up time was 6years (0-21) for the SR implants and 26years (1-37) for the perichondrium transplants. Median age at index surgery was 64years (24-82) for SR implants and 45years (18-61) for perichondium transplants. MCP joint survival was slightly better in the perichondrium group (86.7%; 95% confidence interval [CI]: 69.4-100.0) than in the SR implant group (75%; CI 53.8-96.1), but not statistically significantly so (p=0.4). PIP joint survival was also slightly better in the perichondrium group (80%; CI 55-100) than in the SR implant group (74.7%; CI 66.6-82.7), but below the threshold of statistical significance (p=0.8).ConclusionIn conclusion, resurfacing of finger joints using transplanted perichondrium is a technique worth considering since the method has low revision rates in the medium term and compares favorable to SR implants.Level of evidenceIII (Therapeutic).

BackgroundThe aim of our study was to compare the long-term outcome after perichondrium transplantation and two-component surface replacement (SR) implants to the metacarpophalangeal (MCP) and the proximal interphalangeal (PIP) joints.MethodsWe evaluated 163 joints in 124 patients, divided into 138 SR implants in 102 patients and 25 perichondrium transplantations in 22 patients. Our primary outcome was any revision surgery of the index joint.ResultsThe median follow-up time was 6years (0-21) for the SR implants and 26years (1-37) for the perichondrium transplants. Median age at index surgery was 64years (24-82) for SR implants and 45years (18-61) for perichondium transplants. MCP joint survival was slightly better in the perichondrium group (86.7%; 95% confidence interval [CI]: 69.4-100.0) than in the SR implant group (75%; CI 53.8-96.1), but not statistically significantly so (p=0.4). PIP joint survival was also slightly better in the perichondrium group (80%; CI 55-100) than in the SR implant group (74.7%; CI 66.6-82.7), but below the threshold of statistical significance (p=0.8).ConclusionIn conclusion, resurfacing of finger joints using transplanted perichondrium is a technique worth considering since the method has low revision rates in the medium term and compares favorable to SR implants.Level of evidenceIII (Therapeutic).

BackgroundThe aim of our study was to compare the long-term outcome after perichondrium transplantation and two-component surface replacement (SR) implants to the metacarpophalangeal (MCP) and the proximal interphalangeal (PIP) joints.MethodsWe evaluated 163 joints in 124 patients, divided into 138 SR implants in 102 patients and 25 perichondrium transplantations in 22 patients. Our primary outcome was any revision surgery of the index joint.ResultsThe median follow-up time was 6years (0-21) for the SR implants and 26years (1-37) for the perichondrium transplants. Median age at index surgery was 64years (24-82) for SR implants and 45years (18-61) for perichondium transplants. MCP joint survival was slightly better in the perichondrium group (86.7%; 95% confidence interval [CI]: 69.4-100.0) than in the SR implant group (75%; CI 53.8-96.1), but not statistically significantly so (p=0.4). PIP joint survival was also slightly better in the perichondrium group (80%; CI 55-100) than in the SR implant group (74.7%; CI 66.6-82.7), but below the threshold of statistical significance (p=0.8).ConclusionIn conclusion, resurfacing of finger joints using transplanted perichondrium is a technique worth considering since the method has low revision rates in the medium term and compares favorable to SR implants.Level of evidenceIII (Therapeutic).

BackgroundThe aim of our study was to compare the long-term outcome after perichondrium transplantation and two-component surface replacement (SR) implants to the metacarpophalangeal (MCP) and the proximal interphalangeal (PIP) joints.MethodsWe evaluated 163 joints in 124 patients, divided into 138 SR implants in 102 patients and 25 perichondrium transplantations in 22 patients. Our primary outcome was any revision surgery of the index joint.ResultsThe median follow-up time was 6years (0-21) for the SR implants and 26years (1-37) for the perichondrium transplants. Median age at index surgery was 64years (24-82) for SR implants and 45years (18-61) for perichondium transplants. MCP joint survival was slightly better in the perichondrium group (86.7%; 95% confidence interval [CI]: 69.4-100.0) than in the SR implant group (75%; CI 53.8-96.1), but not statistically significantly so (p=0.4). PIP joint survival was also slightly better in the perichondrium group (80%; CI 55-100) than in the SR implant group (74.7%; CI 66.6-82.7), but below the threshold of statistical significance (p=0.8).ConclusionIn conclusion, resurfacing of finger joints using transplanted perichondrium is a technique worth considering since the method has low revision rates in the medium term and compares favorable to SR implants.Level of evidenceIII (Therapeutic).

BackgroundThe aim of our study was to compare the long-term outcome after perichondrium transplantation and two-component surface replacement (SR) implants to the metacarpophalangeal (MCP) and the proximal interphalangeal (PIP) joints.MethodsWe evaluated 163 joints in 124 patients, divided into 138 SR implants in 102 patients and 25 perichondrium transplantations in 22 patients. Our primary outcome was any revision surgery of the index joint.ResultsThe median follow-up time was 6years (0-21) for the SR implants and 26years (1-37) for the perichondrium transplants. Median age at index surgery was 64years (24-82) for SR implants and 45years (18-61) for perichondium transplants. MCP joint survival was slightly better in the perichondrium group (86.7%; 95% confidence interval [CI]: 69.4-100.0) than in the SR implant group (75%; CI 53.8-96.1), but not statistically significantly so (p=0.4). PIP joint survival was also slightly better in the perichondrium group (80%; CI 55-100) than in the SR implant group (74.7%; CI 66.6-82.7), but below the threshold of statistical significance (p=0.8).ConclusionIn conclusion, resurfacing of finger joints using transplanted perichondrium is a technique worth considering since the method has low revision rates in the medium term and compares favorable to SR implants.Level of evidenceIII (Therapeutic).