{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T15:22:56Z","timestamp":1792509776276,"version":"4.5.0"},"reference-count":30,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2025,2,12]],"date-time":"2025-02-12T00:00:00Z","timestamp":1739318400000},"content-version":"vor","delay-in-days":42,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["esskajournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J. exp. orthop."],"published-print":{"date-parts":[[2025,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>To evaluate current knowledge and discover potential controversies in treating torsional deformities of the lower limb in patients with lateral patellar dislocation (LPD) among patellofemoral experts.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>An online survey was distributed to all active International Patellofemoral Study Group (IPSG) members, representing an international sample of orthopaedic surgeons with a specific interest and experience in patellofemoral joint disorders. The survey included 21 single\u2010 and multiple\u2010choice questions and was distributed by email between 2022 and 2023.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Thirty\u2010five members (54%) completed the questionnaire. The responding experts conduct a hip\u2013knee\u2013ankle magnetic resonance imaging or computed tomography following first\u2010time and recurrent patellar dislocation based on clinical examination (43% and 49%, respectively), routinely (6% and 23%, respectively), or not at all (51% and 29%, respectively). Two thirds of the experts perform derotational osteotomies of the femur, and 37% perform derotational osteotomies of the tibia. Most of these surgeons (61% and 69%, respectively) perform less than five derotational osteotomies of the femur or tibia per year. The most important factors for performing derotational osteotomy are abnormal torsion (100%), abnormal gait pattern (57%), revision cases (74%) and recurrent patellar instability (61%). Most surgeons (65%) agree on a cut\u2010off value of &gt;30\u00b0 of femoral ante\u2010torsion and &gt;35\u00b0 of external tibial torsion to perform derotational osteotomy, but the preferred measurement techniques vary.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Torsional deformities of the lower limb are a clinically relevant topic in the management of patients with recurrent LPD. Although the caseload is low, most experts perform derotational osteotomies. Diagnostic and therapeutic algorithms overlap widely between surgeons, but the indication and cut\u2010off values for performing derotational osteotomy must be further established.<\/jats:p><\/jats:sec><jats:sec><jats:title>Study Design<\/jats:title><jats:p>Survey.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of Evidence<\/jats:title><jats:p>Level V.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jeo2.70116","type":"journal-article","created":{"date-parts":[[2025,2,13]],"date-time":"2025-02-13T01:40:06Z","timestamp":1739410806000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Derotational osteotomy is a relevant procedure in the management of lateral patellar dislocation: An expert survey of the International Patellofemoral Study Group"],"prefix":"10.1002","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6433-9896","authenticated-orcid":false,"given":"Guido","family":"Wierer","sequence":"first","affiliation":[{"name":"Department of Orthopedics and Traumatology Paracelsus Medical University Salzburg Austria"},{"name":"Research Unit for Orthopaedic Sports Medicine and Injury Prevention Private University for Health Sciences, Medical Informatics and Technology Hall in Tirol Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Danko","family":"Milinkovic","sequence":"additional","affiliation":[{"name":"Center for Musculoskeletal Surgery Charit\u00e9\u2010University Medicine Berlin Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gerd","family":"Seitlinger","sequence":"additional","affiliation":[{"name":"Orthofocus Salzburg Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Liebensteiner","sequence":"additional","affiliation":[{"name":"Orthop\u00e4die f\u00fcr H\u00fcfte, Knie &amp; Fu\u00df im Zentrum Innsbruck Austria"},{"name":"Private Hospital Kettenbr\u00fccke Innsbruck Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"William","family":"Post","sequence":"additional","affiliation":[{"name":"Mountaineer Orthopedic Specialists Morgantown West Virginia USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-3186-1042","authenticated-orcid":false,"given":"Philipp W.","family":"Winkler","sequence":"additional","affiliation":[{"name":"Department for Orthopaedics and Traumatology Kepler University Hospital GmbH, Johannes Kepler University Linz Linz Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,2,12]]},"reference":[{"key":"e_1_2_12_2_1","doi-asserted-by":"publisher","DOI":"10.1186\/s40634-022-00499-3"},{"key":"e_1_2_12_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jisako.2024.02.002"},{"key":"e_1_2_12_4_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-022-07245-3"},{"key":"e_1_2_12_5_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546517704178"},{"key":"e_1_2_12_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-022-07265-z"},{"key":"e_1_2_12_7_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-022-07255-1"},{"key":"e_1_2_12_8_1","doi-asserted-by":"publisher","DOI":"10.1002\/ksa.12015"},{"key":"e_1_2_12_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jisako.2024.02.015"},{"key":"e_1_2_12_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00402-022-04541-y"},{"key":"e_1_2_12_11_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-018-5000-9"},{"key":"e_1_2_12_12_1","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.E.01130"},{"key":"e_1_2_12_13_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-023-07533-6"},{"key":"e_1_2_12_14_1","doi-asserted-by":"publisher","DOI":"10.1177\/03635465231152475"},{"key":"e_1_2_12_15_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-018-5212-z"},{"key":"e_1_2_12_16_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-019-05542-y"},{"key":"e_1_2_12_17_1","doi-asserted-by":"publisher","DOI":"10.2214\/AJR.09.3702"},{"key":"e_1_2_12_18_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00402-016-2536-3"},{"key":"e_1_2_12_19_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00113-017-0452-9"},{"key":"e_1_2_12_20_1","doi-asserted-by":"publisher","DOI":"10.2106\/JBJS.20.00020"},{"key":"e_1_2_12_21_1","doi-asserted-by":"publisher","DOI":"10.1177\/0363546517732045"},{"key":"e_1_2_12_22_1","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-198769080-00010"},{"key":"e_1_2_12_23_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2024.05.007"},{"key":"e_1_2_12_24_1","doi-asserted-by":"publisher","DOI":"10.1002\/ksa.12097"},{"key":"e_1_2_12_25_1","doi-asserted-by":"publisher","DOI":"10.1097\/00132588-200603000-00003"},{"key":"e_1_2_12_26_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-2008-1033007"},{"key":"e_1_2_12_27_1","doi-asserted-by":"publisher","DOI":"10.1002\/ksa.12021"},{"key":"e_1_2_12_28_1","doi-asserted-by":"publisher","DOI":"10.1177\/03635465211063176"},{"key":"e_1_2_12_29_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-020-06291-z"},{"key":"e_1_2_12_30_1","doi-asserted-by":"publisher","DOI":"10.1002\/jor.1100050111"},{"key":"e_1_2_12_31_1","doi-asserted-by":"publisher","DOI":"10.1002\/ksa.12246"}],"container-title":["Journal of Experimental Orthopaedics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/esskajournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/jeo2.70116","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,16]],"date-time":"2025-10-16T19:25:00Z","timestamp":1760642700000},"score":1,"resource":{"primary":{"URL":"https:\/\/esskajournals.onlinelibrary.wiley.com\/doi\/10.1002\/jeo2.70116"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,1]]},"references-count":30,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2025,1]]}},"alternative-id":["10.1002\/jeo2.70116"],"URL":"https:\/\/doi.org\/10.1002\/jeo2.70116","archive":["Portico"],"relation":{},"ISSN":["2197-1153","2197-1153"],"issn-type":[{"value":"2197-1153","type":"print"},{"value":"2197-1153","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,1]]},"assertion":[{"value":"2024-10-22","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2024-11-13","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-02-12","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e70116"}}