Potential factors in postoperative dislocation of Oxford phase III mobile bearing UKA in Chinese patients: a single-center retrospective study

BMC Musculoskeletal Disorders

Hui Huang¹  Haining Zhang²  Chenkai Li²  Zian Zhang²  Tao Li²  Tian Chen³ 

[1] Department of Anesthesiology, The Affiliated Hospital of Qingdao University, 266000, Qingdao, Shandong, China;Department of Joint Surgery, The Affiliated Hospital of Qingdao University, 266000, Qingdao, Shandong, China;Zhongtai Securities Institute for Financial Studies, Shandong University, 250100, Jinan, China;

关键词: Unicompartmental knee arthroplasty;    Mobile bearing;    Complication;    Bearing dislocation;   

DOI  :  10.1186/s12891-021-04828-y

来源: Springer

【 摘 要 】

BackgroundBearing dislocation is the main complication after mobile bearing unicompartmental knee arthroplasty. The purpose of this study was to analyze the potential risk factors of bearing dislocation after Oxford phase III mobile bearing unicompartmental knee arthroplasty in Chinese patients.MethodsWe retrospectively investigated 492 patients (578 knees) who underwent Oxford phase III mobile bearing unicompartmental knee arthroplasty in our institution between February 2009 and June 2019. The patients were divided into two groups based on surgeons’ annual surgical volume. Those with/ without bearing dislocation were compared based on patient, surgeon and implant factors.ResultsAmong the 492 patients, 21 (4.3%, 4 men and 17 women) experienced bearing dislocation. Of these, 14 (4.0%) were in the high surgical volume group and 7 (5.1%) were in the low surgical volume group. Multivariate analysis revealed that trauma to the operated leg and daily life involving high knee flexion cumulatively predicted bearing dislocation (p < 0.05).ConclusionsTrauma to the operated leg and daily life involving high knee flexion were risk factors for bearing dislocation after Oxford phase III mobile bearing unicompartmental knee arthroplasty.

【 授权许可】

CC BY