Tarasevicius Sarunas, Kesteris Uldis, Robertsson Otto, Wingstrand Hans
Department of Orthopaedics, Kaunas Medical University, Lithuania.
Acta Orthop. 2006 Oct;77(5):706-9. doi: 10.1080/17453670610012872.
In a previous study concerning 1,660 ScanHip THAs that were followed for up to 12 years, the cumulative revision rate was not found to be dependent on whether a 22-mm or a 32-mm head size had been used. We have re-examined these patients to see whether a longer follow-up time (9-21 years) would disclose an effect of head size on the revision rate.
We analyzed the cumulative revision rate for 1,720 Scan Hip arthroplasties with either 22-mm or 32-mm femoral heads. The patients were followed for 9-21 years.
Arthroplasties with 32-mm head had 2.8-times higher cumulative revision rate than those with a 22-mm head. Older age reduced the risk of revision while male sex increased the risk.
We found that head size affects revision risk, but that even in a reasonably large material a long follow-up time is required to disclose the effects of head size--and thus wear--on survival.
在一项对1660例接受ScanHip全髋关节置换术（THA）且随访长达12年的研究中，未发现累积翻修率取决于所使用的股骨头尺寸是22毫米还是32毫米。我们对这些患者进行了重新检查，以确定更长的随访时间（9至21年）是否会揭示股骨头尺寸对翻修率的影响。
我们分析了1720例采用22毫米或32毫米股骨头的Scan髋关节置换术的累积翻修率。对患者进行了9至21年的随访。
使用32毫米股骨头的关节置换术的累积翻修率比使用22毫米股骨头的高2.8倍。年龄较大可降低翻修风险，而男性则增加翻修风险。
我们发现股骨头尺寸会影响翻修风险，但即使在相当大的样本中，也需要较长的随访时间才能揭示股骨头尺寸——进而磨损——对假体存活的影响。
