Lateral trochlear inclination measured by the transepicondylar axis holds potential for evaluating trochlear dysplasia in patients with lateral patellar dislocation

作者全名："Chen, Jiaxing; Li, Xinyi; Feng, Yi; Li, Qiaochu; Xu, Zijie; Wang, Linbang; Zhang, Jian; Quan, Zhengxue; Zhou, Aiguo"

作者地址："[Chen, Jiaxing; Li, Qiaochu; Zhang, Jian; Quan, Zhengxue; Zhou, Aiguo] Chongqing Med Univ, Affiliated Hosp 1, Dept Orthoped, Chongqing 400016, Peoples R China; [Chen, Jiaxing; Li, Qiaochu; Zhang, Jian; Quan, Zhengxue; Zhou, Aiguo] Chongqing Med Univ, Orthoped Lab, Chongqing 400016, Peoples R China; [Li, Xinyi] Chongqing Med Univ, Affiliated Hosp 1, Dept Orthoped, Chongqing 400016, Peoples R China; [Feng, Yi] Chongqing Med Univ, Affiliated Hosp 1, Med Educ Dept, Chongqing 400016, Peoples R China; [Xu, Zijie] Peking Univ Third Hosp, Dept Sports Med, Beijing Key Lab Sports Injuries, Beijing 100191, Peoples R China; [Wang, Linbang] Peking Univ Third Hosp, Dept Orthoped, Beijing 100191, Peoples R China"

通信作者："Quan, ZX; Zhou, AG (通讯作者)，Chongqing Med Univ, Affiliated Hosp 1, Dept Orthoped, Chongqing 400016, Peoples R China.; Quan, ZX; Zhou, AG (通讯作者)，Chongqing Med Univ, Orthoped Lab, Chongqing 400016, Peoples R China."

来源：KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY

ESI学科分类：CLINICAL MEDICINE

WOS号：WOS:001151166400002

JCR分区：Q1

影响因子：3.3

年份：2023

卷号：　

期号：　

开始页：　

结束页：　

文献类型：Article; Early Access

关键词：Patellar dislocation; Trochlear dysplasia; Lateral trochlear inclination; Transepicondylar axis; Magnetic resonance imaging; Anthropometry

摘要："Purpose To verify that lateral trochlear inclination (LTI) measured by the transepicondylar axis can reliably be used to evaluate trochlear dysplasia (TD) on MRI and can serve as an objective indication of trochleoplasty for patients with lateral patellar dislocation (LPD). Methods Eighty patients with recurrent LPD and eighty healthy subjects were included. TD, posterior condylar angle (PCA), and LTI measured by the posterior condylar reference line (LTIp), surgical transepicondylar axis (LTIs), and anatomical transepicondylar axis (LTIa) were assessed on MRI. The intraclass correlation coefficient (ICC) and Bland-Altman analysis were performed, the correlations and differences amongst the parameters were identified, and a binary logistic regression model was established. Results Each measurement had excellent inter- and intra-observer agreement. The LTIp, LTIs and LTIa were smaller in the study group than in the control group, with mean differences of 9.0(degrees), 7.2(degrees) and 7.0(degrees), respectively (P < 0.001). The PCA was larger in patients with LPD than in the control group (P < 0.001). LTIp was associated with PCA in the study group (r = - 0.41, P < 0.001). The pathological values of LTIp, LTIs and LTIa were 11.7(degrees), 15.3(degrees) and 17.4(degrees), respectively. LTIs and LTIa were independent risk factors for LPD, with ORs of 7.33 (95% CI [1.06-52.90], P = 0.048) and 10.29 (95% CI [1.38-76.96], P = 0.023), respectively. Conclusion The LTI can be reliably measured by MRI, but LTIp could potentially decrease the recorded value from the actual inclination angle. LTIs and LTIa are more appropriate to serve as trochleoplasty indications for patients with LPD, which could help orthopedists with surgical decision-making. Level of evidenceLevel III."

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