Kärrholm J, Borssén B, Löwenhielm G, Snorrason F
Sahlgren Hospital, Gothenburg, Sweden.
J Bone Joint Surg Br. 1994 Nov;76(6):912-7.
Roentgen stereophotogrammetry was used to measure the migration of the centre of the femoral head in 84 cemented Lubinus SP I hip arthroplasties (58 primary operations, 26 revisions). Four to seven years later, seven femoral components had been revised because of painful loosening. These implants showed greater subsidence, medial migration and posterior migration during the first two postoperative years than did the hips which had not been revised. Six months after operation, subsidence of more than 0.33 mm combined with a total migration of more than 0.85 mm predicted an increased risk of subsequent revision; the amount of subsidence at two years was an even better predictor. The probability of revision was greater than 50% if the subsidence at two years was 1.2 mm or more.
采用X线立体摄影测量法对84例Lubinus SP I型骨水泥型髋关节置换术（58例初次手术，26例翻修手术）患者的股骨头中心移位情况进行了测量。4至7年后，有7个股骨假体因疼痛性松动而进行了翻修。与未翻修的髋关节相比，这些植入物在术后头两年出现了更大程度的下沉、向内侧移位和向后移位。术后6个月，下沉超过0.33毫米且总移位超过0.85毫米预示着随后翻修风险增加；两年时的下沉量是更好的预测指标。如果两年时下沉量达到1.2毫米或更多，翻修的概率大于50%。
