{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T12:19:52Z","timestamp":1792498792271,"version":"4.5.0"},"reference-count":56,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,1,13]],"date-time":"2026-01-13T00:00:00Z","timestamp":1768262400000},"content-version":"vor","delay-in-days":12,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["esskajournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J. exp. orthop."],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To assess the mid\u2010 to long\u2010term 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.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>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\u2010up of 5 years. Kaplan\u2013Meier survival analysis was performed for the risk of recurrent instability or undergoing further surgery other than hardware removal. Patient\u2010reported 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\u2010Return to Sport after Injury [PFI\u2010RSI] scale) were recorded.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Of 44 knees in 42 patients eligible for inclusion, 25 knees in 24 patients (64% female) with a mean age of 27.3\u2009\u00b1\u20099.0 years at the time of surgery were available for follow\u2010up at a mean of 8.7\u2009\u00b1\u20092.7 years (follow\u2010up: 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\u20137.0) years post\u2010operatively. The Kaplan\u2013Meier estimator showed a survival probability free of recurrent instability and revision (except hardware removal) of 87% (95%\u2010confidence interval 76%\u2013100%) at 5 years. At final follow\u2010up, patients reported good knee function (Kujala score: 78.5\u2009\u00b1\u200916.6), knee\u2010related quality of life (BPII: 68.3\u2009\u00b1\u200922.3), psychological readiness to return to sport (PFI\u2010RSI: 73.3 [43.8\u201390.0]), and moderate activity levels (TAS: 4.0 [3.0\u20134.0]). The majority of patients returned to sports (84%).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>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\u2010 to long\u2010term follow\u2010up.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>Level IV, retrospective case series.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/jeo2.70629","type":"journal-article","created":{"date-parts":[[2026,1,13]],"date-time":"2026-01-13T10:47:26Z","timestamp":1768301246000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Favourable mid\u2010 to long\u2010term clinical and functional outcomes and low redislocation rates following derotational distal femoral osteotomy for the treatment of recurrent patellofemoral instability"],"prefix":"10.1002","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-2135-9989","authenticated-orcid":false,"given":"Peter","family":"Rab","sequence":"first","affiliation":[{"name":"Department of Sports Orthopaedics, TUM University Hospital Technical University of Munich Munich Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6167-3741","authenticated-orcid":false,"given":"Andrea","family":"Achtnich","sequence":"additional","affiliation":[{"name":"Department of Sports Orthopaedics, TUM University Hospital Technical University of Munich Munich Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2649-8420","authenticated-orcid":false,"given":"Maximilian","family":"Hinz","sequence":"additional","affiliation":[{"name":"Department of Sports Orthopaedics, TUM University Hospital Technical University of Munich Munich 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