Palmer S H, Morrison P J, Ross A C
Bath and Wessex Orthopaedic Research Unit, Wolfson Centre, Royal United Hospital, United Kingdom.
Clin Orthop Relat Res. 1998 May(350):143-8.
Unicompartmental knee arthroplasty is an appropriate method of treating selected patients with osteoarthritis of the medial compartment of the knee. The common causes of failure are aseptic loosening, infection, patellofemoral pain, and deterioration in the opposite compartment. Seven cases of a cohort of 32 Robert Brigham unicondylar knee replacements that failed because of early catastrophic wear of the polyethylene tibial component are reported. Possible reasons suggested for failure include inadequate thickness of polyethylene, fusion defects in the polyethylene structure as a result of the sterilization process, increased rotational freedom, and reduced conformity in the design of the prosthesis.
单髁膝关节置换术是治疗特定膝关节内侧间室骨关节炎患者的一种合适方法。失败的常见原因包括无菌性松动、感染、髌股关节疼痛以及对侧间室的退变。本文报告了一组32例罗伯特·布里格姆单髁膝关节置换术中，有7例因聚乙烯胫骨部件早期灾难性磨损而失败的病例。提示失败的可能原因包括聚乙烯厚度不足、灭菌过程导致的聚乙烯结构融合缺陷、旋转自由度增加以及假体设计中贴合度降低。
