{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,11]],"date-time":"2026-08-11T21:28:46Z","timestamp":1786483726742,"version":"build-2736575974"},"reference-count":65,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2018,7,14]],"date-time":"2018-07-14T00:00:00Z","timestamp":1531526400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2018,7,14]],"date-time":"2018-07-14T00:00:00Z","timestamp":1531526400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/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":[[2019,1,30]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>To examine the predictors of the second\u2010time lateral patellar dislocation (LPD) in patients after acute first\u2010time LPD in a 5\u2010year follow\u2010up.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Data were collected prospectively from patients after acute first\u2010time LPD with conservative treatment. Factors included sex, age at the first\u2010time LPD, anatomical variants [trochlear dysplasia, patellar height, tibial tuberosity\u2013trochlear groove (TT\u2013TG) distance], and injury patterns of medial patellofemoral ligament (MPFL) in acute first\u2010time LPD. Logistic regression was carried out to identify the independent risk factors for the incidence of the second\u2010time LPD.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The incidence rate of a second\u2010time LPD was 35.5% (59 of 166) in the 5\u2010year follow\u2010up. Univariate analysis revealed significant differences in the incidence rate of the second\u2010time LPD among age at the first\u2010time LPD (<jats:italic>P<\/jats:italic>\u2009=\u20090.04), trochlear dysplasia (<jats:italic>P<\/jats:italic>\u2009=\u20090.003), patella height (<jats:italic>P<\/jats:italic>\u2009=\u20090.017) and the TT\u2013TG distance (<jats:italic>P<\/jats:italic>\u2009=\u20090.027). Risk factors for the second\u2010time LPD were age &lt;\u200918 years at the first\u2010time LPD [odds ratio (OR) 4.088], low\u2010grade trochlear dysplasia (OR 7.214), high\u2010grade trochlear dysplasia (OR 18.945), patella alta (OR 8.416), elevated TT\u2013TG distance (OR 12.742), complete MPFL tear at its isolated femoral\u2010side (OR 6.04) and complete combined MPFL tear (OR 5.851).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Trochlear dysplasia, elevated TT\u2013TG distance, patella alta, age &lt;\u200918 years at the first\u2010time LPD, complete MPFL tear at its isolated femoral\u2010side and complete combined MPFL tear in the first\u2010time LPD are independently associated with a higher incidence rate of the second\u2010time LPD.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>III.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-018-5062-8","type":"journal-article","created":{"date-parts":[[2018,7,14]],"date-time":"2018-07-14T05:28:37Z","timestamp":1531546117000},"page":"197-205","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":56,"title":["Incidence of second\u2010time lateral patellar dislocation is associated with anatomic factors, age and injury patterns of medial patellofemoral ligament in first\u2010time lateral patellar dislocation: a prospective magnetic resonance imaging study with 5\u2010year follow\u2010up"],"prefix":"10.1002","volume":"27","author":[{"given":"Guang\u2010ying","family":"Zhang","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Ultrasonography Shandong Provincial Qianfoshan Hospital of Shandong University 16766 Jingshi Rd, Li\u2010Xia District 250014 Jinan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hong\u2010yu","family":"Ding","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Ultrasonography Shandong Provincial Qianfoshan Hospital of Shandong University 16766 Jingshi Rd, Li\u2010Xia District 250014 Jinan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"En\u2010miao","family":"Li","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Department of Ultrasonography Jinan Third People\u2019s Hospital 250132 Jinan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lei","family":"Zheng","sequence":"additional","affiliation":[{"name":"<!--<label>3<\/label>--> Department of Radiology Shandong Provincial Corps Hospital of Chinese People\u2019s Armed Police Force 250014 Jinan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zheng\u2010wu","family":"Bai","sequence":"additional","affiliation":[{"name":"<!--<label>4<\/label>--> Department of Orthopaedics Shandong Provincial Qianfoshan Hospital of Shandong University 250014 Jinan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao","family":"Shi","sequence":"additional","affiliation":[{"name":"<!--<label>5<\/label>--> Department of Radiology Shandong Provincial Qianfoshan Hospital of Shandong University 250014 Jinan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Feng\u2010jing","family":"Fan","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Ultrasonography Shandong Provincial Qianfoshan Hospital of Shandong University 16766 Jingshi Rd, Li\u2010Xia District 250014 Jinan 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