Cheung Kin-Wing, Yung Shu-Hang, Wong Kwok-Chuen, Chiu Kwok-Hing
Department of Orthopaedics and Traumatology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China.
J Arthroplasty. 2005 Aug;20(5):627-31. doi: 10.1016/j.arth.2004.10.002.
The early results of smooth hydroxyapatite-coated press-fit acetabular cup are comparable to porous-coated press-fit cup, but these results deteriorate dramatically after 5 years. In this study, 66 primary total hip arthroplasties performed between 1994 and 1998 were reviewed. The average follow-up was 6.5 years. Of the 66 arthroplasties, 8 acetabular cups were revised for aseptic loosening presenting as rapid change of cup position. The average duration of symptoms before revision was 3 months. The survival of the cups at 5 and 9 years were 95.4% and 83%, respectively. The rapid clinical deterioration after 5 years may be due to lack of bone ingrowth into the cup making it unable to resist the shearing stress in the acetabulum. Radiolucent line was not an accurate sign for the detection of mechanical failure.
光滑羟基磷灰石涂层压配式髋臼杯的早期结果与多孔涂层压配式髋臼杯相当，但5年后这些结果会显著恶化。在本研究中，回顾了1994年至1998年间进行的66例初次全髋关节置换术。平均随访时间为6.5年。在这66例置换术中，有8个髋臼杯因无菌性松动而翻修，表现为髋臼杯位置快速改变。翻修前症状的平均持续时间为3个月。髋臼杯在5年和9年时的生存率分别为95.4%和83%。5年后临床快速恶化可能是由于骨长入髋臼杯不足，使其无法抵抗髋臼中的剪切应力。透亮线不是检测机械故障的准确征象。
