Yoder S A, Brand R A, Pedersen D R, O'Gorman T W
Department of Orthopaedic Surgery, University of Iowa, Iowa City 52242.
Clin Orthop Relat Res. 1988 Mar(228):79-87.
Loosening is the most common long-term problem following total hip arthroplasty. Many factors, including patient selection, cement technique, femoral component placement, and prosthesis design reportedly affect the incidence of loosening. Theoretically, the location of the hip center of rotation substantially affects the load on the hip, and superior and lateral hip center location will result in higher loads than medial and inferior placement. Long-term follow-up studies (average, 9.1 years after surgery) using logistical regression analysis demonstrate significantly higher rates of femoral loosening with acetabular components placed in a superior and lateral (i.e., nonanatomic) position, compared with acetabular components placed in a nearly anatomic position.
松动是全髋关节置换术后最常见的长期问题。据报道，包括患者选择、骨水泥技术、股骨部件放置和假体设计在内的许多因素都会影响松动的发生率。从理论上讲，髋关节旋转中心的位置会极大地影响髋关节的负荷，髋关节中心位置偏上和偏外侧会比偏内侧和偏下产生更高的负荷。使用逻辑回归分析的长期随访研究（平均术后9.1年）表明，与放置在接近解剖位置的髋臼部件相比，放置在偏上和偏外侧（即非解剖位置）的髋臼部件导致股骨松动的发生率显著更高。
