Kim Kyungsoo, Kim Yoon Hyuk, Park Won Man, Rhyu Kee Hyung
Department of Mathematics, Kyonggi University, Suwon, Korea.
Comput Aided Surg. 2010;15(4-6):98-103. doi: 10.3109/10929088.2010.515419. Epub 2010 Sep 27.
During computer navigated total knee arthroplasty, pin holes are drilled in the femur and tibia to allow the placement of navigation trackers, and fractures associated with these pin holes have recently been reported. We hypothesized that an increase in stress around the pin holes is one of the most relevant factors contributing to the fracture. In this study, we used finite element analysis to investigate the stresses around femoral pin holes with respect to the mode of pin penetration, the diameter of the pin holes, and the degree of osteoporosis. Our results indicate that increases in pin hole diameter and reduction in bone strength as a result of osteoporosis intensify the stresses around the pin holes, especially in cases of transcortical pin penetration.
在计算机导航全膝关节置换术中，要在股骨和胫骨上钻孔以放置导航跟踪器，最近有报道称与这些针孔相关的骨折。我们推测针孔周围应力增加是导致骨折的最相关因素之一。在本研究中，我们使用有限元分析来研究股骨针孔周围的应力，涉及针的穿透方式、针孔直径和骨质疏松程度。我们的结果表明，针孔直径的增加以及骨质疏松导致的骨强度降低会加剧针孔周围的应力，尤其是在经皮质针穿透的情况下。
