Xu W, Crocombe A D, Hughes S C
School of Mechanical and Materials Engineering, University of Surrey, Guildford, UK.
Proc Inst Mech Eng H. 2000;214(6):595-602. doi: 10.1243/0954411001535624.
Direct skeletal attachment techniques have recently been identified as an alternative method for percutaneous attachment of prosthetic limbs. Osseointegrated implants for prosthetic attachments are subjected to a complex load condition. This finite element study investigates the effect of varying geometries of the implant on the stress and strain distribution in the area of the bone/implant interface. Simplified three-dimensional axisymmetric models of the femur and seven implants with different core diameters, external diameters, implant lengths and thread pitches were derived. The resulting stress and strain distributions were compared. The significance of each implant geometry was identified for improving implant design in the light of benefit to the bone/implant osseointegration and the bone remodelling of the femur.
直接骨骼附着技术最近已被确定为假肢经皮附着的一种替代方法。用于假肢附着的骨整合植入物承受着复杂的负荷条件。这项有限元研究调查了植入物不同几何形状对骨/植入物界面区域应力和应变分布的影响。推导了股骨的简化三维轴对称模型以及七种具有不同芯直径、外径、植入长度和螺距的植入物。比较了由此产生的应力和应变分布。根据对骨/植入物骨整合和股骨骨重塑的益处，确定了每种植入物几何形状对改进植入物设计的重要性。
