{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,3]],"date-time":"2026-11-03T16:40:34Z","timestamp":1793724034023,"version":"4.6.1"},"reference-count":40,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2022,3,26]],"date-time":"2022-03-26T00:00:00Z","timestamp":1648252800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2022,3,26]],"date-time":"2022-03-26T00:00:00Z","timestamp":1648252800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"},{"start":{"date-parts":[[2022,3,26]],"date-time":"2022-03-26T00:00:00Z","timestamp":1648252800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2022,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>Patellar instability is a frequent clinical situation in adolescents and young adults. One of the most important risk factors of this condition is trochlea dysplasia. Few studies have analyzed the role of patellar dysplasia. The objective of this paper was to assess the correlation between trochlear and patellar dysplasia. The hypothesis is that patellar dysplasia increased in parallel with femoral trochlear dysplasia.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The study included patients operated on at least one knee for patellar instability between 2008 and 2020. For these patients, symptomatic knees (operated or not) were included if they had lateral and patellofemoral skyline radiographs. Two blinded observers categorized each trochlear and patellar dysplasia according to the Dejour and Wiberg classifications. Patellar height was also measured by applying the Caton\u2013Deschamps index.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A total of 100 patients were selected, involving 149 symptomatic knees. A significant correlation between trochlear and patellar dysplasia types was found (0.82; <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001). Dejour types B and C of trochlear dysplasia were significantly more often associated with patellar dysplasia than Dejour type A (<jats:italic>p<\/jats:italic>\u2009=\u20090.033 and <jats:italic>p<\/jats:italic>\u2009=\u20090.019, respectively). Moreover, severe Wiberg 3 patellar dysplasia was significantly associated with type D Dejour trochlear dysplasia than with the sum of all other Dejour types taken together (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>This study confirms a linear correlation between the severity of patellar and trochlear dysplasia. Further studies are needed to evaluate the place of patellar dysplasia in the therapeutic strategy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>Level IV.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-022-06945-0","type":"journal-article","created":{"date-parts":[[2022,3,28]],"date-time":"2022-03-28T21:03:41Z","timestamp":1648501421000},"page":"3438-3443","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["The severity of patellar and trochlear dysplasia are correlated"],"prefix":"10.1002","volume":"30","author":[{"given":"Victor","family":"Meissburger","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopedic and Trauma Surgery, Centre Hospitalier de Versailles, Andr\u00e9 Mignot Hospital \u00cele\u2010de\u2010France Ouest University 177 Rue de Versailles 78150 Le Chesnay France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gr\u00e9goire","family":"Rougereau","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopedic and Trauma Surgery, Centre Hospitalier de Versailles, Andr\u00e9 Mignot Hospital \u00cele\u2010de\u2010France Ouest University 177 Rue de Versailles 78150 Le Chesnay France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tristan","family":"Langlais","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Department of Pediatric Orthopedics, H\u00f4pital des enfants Toulouse University Purpan 31059 Toulouse France"},{"name":"<!--<label>3<\/label>--> Department of Pediatric Orthopedics, H\u00f4pital Armand\u2010Trousseau AP\u2010HP, Sorbonne University 26 avenue du Dr\u2010Arnold\u2010Netter 75012 Paris 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