{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T08:22:14Z","timestamp":1792570934326,"version":"4.5.0"},"reference-count":43,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2024,1,12]],"date-time":"2024-01-12T00:00:00Z","timestamp":1705017600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004826","name":"Natural Science Foundation of Beijing Municipality","doi-asserted-by":"publisher","award":["L222138"],"award-info":[{"award-number":["L222138"]}],"id":[{"id":"10.13039\/501100004826","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["31900943"],"award-info":[{"award-number":["31900943"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["82202821"],"award-info":[{"award-number":["82202821"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Surgery"],"published-print":{"date-parts":[[2024,2]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>Systematic summary of the epidemiology of patellar dislocation is rare. This study aims to investigate sex\u2010, age\u2010, type\u2010, injury causing events\u2010, incidence of bone bruise and time from last injury (TFLI)\u2010specific characteristics, and detail the epidemiological characteristics of patellar dislocation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Method<\/jats:title><jats:p>In this descriptive epidemiological study, a total of 743 patients who have a history of lateral patellar dislocation with either first\u2010time patellar dislocation (FPD) or recurrent patellar dislocation (RPD) between August 2017 and June 2022 at our institution met the inclusion criteria and were selected in this study. Patient characteristics including the type, gender, age, events leading to patellar dislocation, incidence of patellar bone bruise, and the time from last injury (TFLI) of patellar dislocation were retrospectively obtained and described. Magnetic resonance imaging scans (MRI) of the knee were reviewed for insuring bone bruise.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Among the 743 patients with patellar dislocation who required surgical reconstruction of the medial retinaculum, 418 (56.2%) had RPD and 325 (43.8%) had FPD. There were more females (65.0%) than males (35.0%) in patellar dislocation patients. Among the female patients, those aged &lt;18\u2009years had higher incidence (31.4%) of patellar dislocation. Among the male patients, those aged &lt;18 and 19\u201328\u2009years had higher incidence (16.8%) of patellar dislocation. Of all age groups, the prevalence rate of patellar dislocation\u00a0was high in juvenile population and females, but with no statistical significance. The most common patellar dislocation\u2010causing event was sport accidents (40.1%), followed by life accidents (23.2%). The incidence of left\u2010knee patellar dislocation was slightly higher than that of right\u2010knee patellar dislocation. The incidence of patellar bone bruise of RPD (63.2%) was significantly lower (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05) than that of FPD (82.2%). Patellar dislocation patients with bone bruise had shorter time from last injury (TFLI) than those without patellar bone bruise (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The incidence of bone bruise of RPD was lower than that of FPD, and patients with patellar bone bruise may have a shorter time from last injury than those without bone bruise.<\/jats:p><\/jats:sec>","DOI":"10.1111\/os.13933","type":"journal-article","created":{"date-parts":[[2024,1,12]],"date-time":"2024-01-12T09:08:57Z","timestamp":1705050537000},"page":"437-443","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Epidemiology of Lateral Patellar Dislocation Including Bone Bruise Incidence: <scp>Five Years of<\/scp> Data from a Trauma Center"],"prefix":"10.1111","volume":"16","author":[{"given":"Ruilan","family":"Dai","sequence":"first","affiliation":[{"name":"College of Exercise and health Sciences, Tianjin University of Sport  Tianjin China"},{"name":"Department of Sports Medicine Peking University Third Hospital, Institute of Sports Medicine of Peking University  Beijing China"},{"name":"Beijing Key Laboratory of Sports Injuries  Beijing China"},{"name":"Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yue","family":"Wu","sequence":"additional","affiliation":[{"name":"College of Exercise and health Sciences, Tianjin University of Sport  Tianjin China"},{"name":"Department of Sports Medicine Peking University Third Hospital, Institute of Sports Medicine of Peking University  Beijing China"},{"name":"Beijing Key Laboratory of Sports Injuries  Beijing China"},{"name":"Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanfang","family":"Jiang","sequence":"additional","affiliation":[{"name":"Department of Sports Medicine Peking University Third Hospital, Institute of Sports Medicine of Peking University  Beijing China"},{"name":"Beijing Key Laboratory of Sports Injuries  Beijing China"},{"name":"Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongshi","family":"Huang","sequence":"additional","affiliation":[{"name":"Department of Sports Medicine Peking University Third Hospital, Institute of Sports Medicine of Peking University  Beijing China"},{"name":"Beijing Key Laboratory of Sports Injuries  Beijing China"},{"name":"Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qingyang","family":"Meng","sequence":"additional","affiliation":[{"name":"Department of Sports Medicine Peking University Third Hospital, Institute of Sports Medicine of Peking University  Beijing China"},{"name":"Beijing Key Laboratory of Sports Injuries  Beijing China"},{"name":"Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weili","family":"Shi","sequence":"additional","affiliation":[{"name":"Department of Sports Medicine Peking University Third Hospital, Institute of Sports Medicine of Peking University  Beijing China"},{"name":"Beijing Key Laboratory of Sports Injuries  Beijing China"},{"name":"Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education  Beijing 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