Effects of the Femoral Offset and the Head Size on the Safe Range of Motion in Total Hip Arthroplasty
Effects of the Femoral Offset and the Head Size on the Safe Range of Motion in Total Hip Arthroplasty
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DOI：
10.1016/j.arth.2008.02.008
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发表时间：
2009-06-01
影响因子：
3.5
通讯作者：
Iwamoto, Yukihide
中科院分区：
文献类型：
--
作者：
Matsushita, Akinobu;Nakashima, Yasuharu;Iwamoto, Yukihide
本研究的目的是量化股骨偏移和头大小对全髋关节置换术后活动范围（ROM）的影响。采用后外侧入路将模块化假体植入11具尸体髋关节，并以3种不同偏移量和5种不同股骨头大小测试ROM。将股骨偏移量增加到4和8个单位，分别改善了21.1度和26.7度屈曲，改善了13.7度和21.2度内旋。ROM的改善主要是由于股骨头的跳跃距离增加，而不是延迟任何撞击。相反，股骨偏移的有效性是由迟发性骨撞击驱动的。
The purpose of this study was to quantify the effects of femoral offset and head size on range of motion (ROM) after total hip arthroplasty. modular prostheses were implanted into 11 cadaveric hips using a posterolateral approach and tested for ROM with 3 different offsets and 5 different femoral head sizes. Increasing the femoral offset to 4 and 8 unit resulted in 21.1 degrees and 26.7 degrees of improved flexion, and 13.7 degrees and 21.2 degrees of improved internal rotation, respectively. The ROM improved in a head size-dependent manner primarily because of increasing the jumping distance of the femoral head rather than delaying any impingement. In contrast, the effectiveness of femoral offset was driven by delayed osseous impingement.