ArticleJournal of experimental orthopaedics2026
Favourable mid- to long-term clinical and functional outcomes and low redislocation rates following derotational distal femoral osteotomy for the treatment of recurrent patellofemoral instability.
Article in Journal of experimental orthopaedics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Assessment and management of torsional malalignment in paediatric patients with patellofemoral joint instability.Journal of children's orthopaedics · 2026Article
- Favourable mid- to long-term clinical and functional outcomes and low redislocation rates following derotational distal femoral osteotomy for the treatment of recurrent patellofemoral instability.Journal of experimental orthopaedics · 2026Article
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9 authors.
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Abstract
Purpose: To assess the mid- to long-term clinical and functional outcomes and return to sports following derotational distal femoral osteotomy (DDFO) for the treatment of recurrent patellofemoral instability and associated increased femoral antetorsion. Methods: Patients who underwent DDFO as well as concomitant procedures between 2007 and 2016 were eligible for inclusion. Recurrent instability, complications, revision surgery and return to sports rates were evaluated after a minimum follow-up of 5 years. Kaplan-Meier survival analysis was performed for the risk of recurrent instability or undergoing further surgery other than hardware removal. Patient-reported outcome measures (PROMs; Visual Analog Scale [VAS] for pain, Tegner Activity Scale [TAS], Kujala score, Banff Patellofemoral Instability Instrument [BPII] 2.0 and Patellofemoral Instability-Return to Sport after Injury [PFI-RSI] scale) were recorded. Results: Of 44 knees in 42 patients eligible for inclusion, 25 knees in 24 patients (64% female) with a mean age of 27.3 ± 9.0 years at the time of surgery were available for follow-up at a mean of 8.7 ± 2.7 years (follow-up: 57%). Two patients (5%) underwent early revision surgery due to loss of osteosynthesis at the distal femur. Three patients (12%) reported subjective recurrent instability at a median of 3.9 (3.5-7.0) years post-operatively. The Kaplan-Meier estimator showed a survival probability free of recurrent instability and revision (except hardware removal) of 87% (95%-confidence interval 76%-100%) at 5 years. At final follow-up, patients reported good knee function (Kujala score: 78.5 ± 16.6), knee-related quality of life (BPII: 68.3 ± 22.3), psychological readiness to return to sport (PFI-RSI: 73.3 [43.8-90.0]), and moderate activity levels (TAS: 4.0 [3.0-4.0]). The majority of patients returned to sports (84%). Conclusion: DDFO provided effective treatment for recurrent patellofemoral instability associated with increased femoral antetorsion. Favourable clinical and functional outcomes as well as high return to sport rates were observed at a mid- to long-term follow-up. Level of Evidence: Level IV, retrospective case series.
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