Organization for Promotion of Tenure Track, University of Miyazaki, Miyazaki, Japan.
Division of Orthopaedic Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.
Med Eng Phys. 2014 Jun;36(6):694-700. doi: 10.1016/j.medengphy.2014.02.018. Epub 2014 Mar 12.
Periprosthetic bone remodeling is commonly seen after total hip arthroplasty, but the remodeling pattern differs among patients even in those implanted with the same stem. Remodeling occurs mainly because of the difference in load transmitted from the stem to the femur. In this study, we evaluated the load-transfer pattern in eight female patients implanted with an anatomical stem on an individual basis by patient-specific finite element analysis that is based on pre- and postoperative computed tomography images. Load transfer was evaluated using interface stress between the stem and bone. One of eight patients demonstrated proximal dominant load transfer, while the other patients demonstrated a distal dominant pattern. The results of our biomechanical simulations reveal the differences in load-transfer pattern after surgery among patients with the same anatomical stem.
全髋关节置换术后常可见假体周围骨重塑，但即使植入相同的假体，不同患者的重塑模式也不同。这种重塑主要是由于假体向股骨传递的负荷不同所致。在这项研究中，我们通过基于术前和术后 CT 图像的个体化有限元分析，评估了 8 名女性患者植入解剖型假体后的负荷传递模式。通过假体与骨之间的界面应力来评估负荷传递。8 名患者中有 1 名表现为近段优势性负荷传递，而其他患者表现为远段优势性模式。我们的生物力学模拟结果揭示了具有相同解剖型假体的患者术后负荷传递模式的差异。
