Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China.
Department of Anesthesiology, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China.
BMC Musculoskelet Disord. 2021 Nov 8;22(1):930. doi: 10.1186/s12891-021-04828-y.
Bearing 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.
We 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.
Among 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).
Trauma 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.
活动垫片式单髁膝关节置换术后脱位是主要并发症。本研究旨在分析中国患者行牛津 III 代活动垫片式单髁膝关节置换术后发生垫片脱位的潜在危险因素。
回顾性分析 2009 年 2 月至 2019 年 6 月在我院行牛津 III 代活动垫片式单髁膝关节置换术的 492 例（578 膝）患者的临床资料。根据术者年手术量将患者分为两组，比较两组患者在患者、术者和假体因素方面的差异。
492 例患者中 21 例（4.3%，4 例男性，17 例女性）发生垫片脱位，其中高手术量组 14 例（4.0%），低手术量组 7 例（5.1%）。多因素分析显示，手术侧外伤和日常生活中膝关节高屈曲位是导致垫片脱位的危险因素（p < 0.05）。
手术侧外伤和日常生活中膝关节高屈曲位是牛津 III 代活动垫片式单髁膝关节置换术后发生垫片脱位的危险因素。
