Kobayashi S, Terayama K
Department of Orthopaedic Surgery, Shinshu University School of Medicine, Matsumoto, Japan.
Arch Orthop Trauma Surg. 1993;112(2):56-60. doi: 10.1007/BF00420254.
Two hundred and sixty-seven consecutive primary low-friction arthroplasties, followed for 5 to 18 years after surgery, were studied to assess the factors influencing survival of the socket, using the Kaplan-Meier method. The end point of survival was defined radiologically in two ways: incipient failure (migration of 3 mm or more or rotation of 4 degrees or more) and definite failure (progressive change of position). Twenty-four sockets (9.0%) developed incipient failure, and 14 of them progressed to definite failure. Preservation of the subchondral bone plate or eburnated bone in the acetabular roof, multiple 6-mm anchor holes, and two steps of evolution in socket design (the advent of a pressure-injection socket and than an ogee-flanged socket) benefited socket survival. Polyethylene wear was considered to be the most important factor limiting longevity of the socket.
对连续267例初次低摩擦关节成形术患者进行研究，这些患者术后随访5至18年，采用Kaplan-Meier方法评估影响髋臼杯生存率的因素。生存率的终点通过两种放射学方法定义：早期失败（移位3毫米或更多或旋转4度或更多）和明确失败（位置的渐进性改变）。24个髋臼杯（9.0%）出现早期失败，其中14个进展为明确失败。髋臼顶下软骨下骨板或骨密质的保留、多个6毫米锚孔以及髋臼杯设计的两个发展阶段（压力注射髋臼杯的出现以及随后的S形凸缘髋臼杯）有利于髋臼杯的生存。聚乙烯磨损被认为是限制髋臼杯使用寿命的最重要因素。
