Orthopaedic Department, University La Sapienza, Rome, Italy.
Int Orthop. 2011 Mar;35(3):317-23. doi: 10.1007/s00264-010-0954-3. Epub 2010 Feb 17.
The purpose of this study was to assess whether large femoral heads (36-38 mm) improve the range of motion in total hip arthroplasty compared to standard (28-32 mm) femoral heads in the presence of optimal and non-optimal cup positioning. A mathematical model of the hip joint was generated by using a laser scan of a dried cadaveric hip. The range of motion was assessed with a cup inclination and anteversion of reference and with non-optimal cup positions. Large femoral heads increased the range of motion, compared to the 28-mm femoral head, in the presence of a hip prosthesis correctly implanted and even more so in the presence of non-optimal cup positioning. However, with respect to the 32-mm femoral head, large femoral heads showed limited benefits both in the presence of optimal and non-optimal cup positioning.
本研究旨在评估在髋臼杯位置优化和非优化的情况下，与标准（28-32mm）股骨头相比，大股骨头（36-38mm）是否能改善全髋关节置换术后的活动范围。通过对干尸髋关节进行激光扫描，生成髋关节的数学模型。通过参考髋臼杯的倾斜度和前倾角来评估活动范围，并评估非优化的髋臼杯位置。与 28mm 股骨头相比，在髋关节假体正确植入的情况下，大股骨头增加了活动范围，在髋臼杯位置非优化的情况下增加得更多。然而，与 32mm 股骨头相比，在髋臼杯位置优化和非优化的情况下，大股骨头的获益有限。
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