【摘要】 运用大型有限元分析软件ABAQUS建立了髋关节置换术后的三维有限元模型。对骨水泥固定有小骨皮质缺损(10%股骨干直径)的羊股骨,进行了扭矩作用下生物力学分析。实验中使用了3种不同长度的股骨柄:股骨柄的末端位于骨皮质缺损处的上端2倍于股骨干直径;股骨柄的末端位于骨皮质缺损处;股骨柄的末端超过骨皮质缺损处的2倍于股骨干直径处的股骨柄。分析结果表明:股骨柄的长度在骨皮质缺损处的不同位置时,孔周围的应力分布也不相同。股骨柄的长度在孔的下部,2倍于股骨干直径位置时,孔周围的应力明显减小。对比使用3种不同长度的股骨柄,股骨上的最大应力值在股骨柄超过骨缺损处2倍于股骨干直径时最小。更多还原

【Abstract】 A three dimensional finite element model after artificial hip replacement was constructed by using ABAQUS finite element software.Biomechanics property of sheep femoral cortical hole(10% bone diameter) with cement femoral component of different length was calculated and illustrated when there was a torsion on the stem.There were three stem: the stem tip were two diameter upside the level of unicortical defect,at the level of unicortical defect,and two diameter bapass the level of unicortical defect.The result shown that the torsion strength around the hole was different if the tip of femoral component at the different location around the small defect.There is a significant tortision strength reduction when the femoral component was extend the stem length to twice the bone diameter.The maximum stress was minimum around the hole when the stem was more than twice the bone diameter.更多还原