Department of Orthopaedic Surgery, Kobe City Medical Center General Hospital, Chuo-ku, Kobe, Japan.
J Arthroplasty. 2011 Oct;26(7):1061-6. doi: 10.1016/j.arth.2011.04.019. Epub 2011 Jun 14.
Several types of acetabular reinforcement devices are used to prevent the collapse of grafted bone in revision total hip arthroplasty. However, it remains unclear how the stress is reduced by different devices. We used finite element analysis to evaluate 4 types of acetabular reinforcement devices: Kerboull-type device, Burch-Schneider anti-protrusio cage, Mueller ring, and Ganz ring. The control was a socket fixed with bone cement without any reinforcement devices. The stress distribution on the inner surface of each socket was calculated by binarization image processing. For all 4 reinforcement devices, the stress was reduced to less than one-half of that in the control. All the devices were useful for preventing the collapse of bulk bone grafts applied to load-bearing defects.
有几种类型的髋臼加强装置用于防止翻修全髋关节置换术中移植骨的塌陷。然而，不同的装置如何减轻应力仍然不清楚。我们使用有限元分析评估了 4 种髋臼加强装置：Kerboull 型装置、Burch-Schneider 抗前突笼、Mueller 环和 Ganz 环。对照为未使用任何加强装置的用骨水泥固定的髋臼杯。通过二值化图像处理计算每个髋臼杯内表面的应力分布。对于所有 4 种加强装置，其应力均降低至对照的一半以下。所有装置均有助于防止应用于承重缺陷的大块骨移植物的塌陷。
