Matsushita Akinobu, Nakashima Yasuharu, Jingushi Seiya, Yamamoto Takuaki, Kuraoka Akio, Iwamoto Yukihide
Department of Orthopedic Surgery, Graduate School of Medical, Sciences, Kyushu University, Fukuoka, Japan.
J Arthroplasty. 2009 Jun;24(4):646-51. doi: 10.1016/j.arth.2008.02.008. Epub 2008 Mar 18.
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 mm 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.
本研究的目的是量化全髋关节置换术后股骨偏心距和股骨头大小对活动范围（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，并使用3种不同的偏心距和5种不同的股骨头大小对ROM进行测试。将股骨偏心距增加到4毫米和8毫米分别导致屈曲改善21.1度和26.7度，内旋改善13.7度和21.2度。ROM以股骨头大小依赖的方式改善，主要是因为增加了股骨头的跳跃距离，而不是延迟了任何撞击。相比之下，股骨偏心距的有效性是由延迟的骨撞击驱动的。
