摘要
背景:股骨矩在人工关节置换中具有重要作用,股骨矩的处理方法有骨水泥重建型和股骨矩骨折复位型,但关于那种处理方法更好的研究不多。目的:三维有限元分析股骨矩骨折复位型和骨水泥重建型重建股骨矩在老年股骨转子间骨折人工关节置换中的生物力学特点。方法:建立股骨矩骨折复位型(模型A)和股骨矩骨水泥重建型(模型B)老年股骨转子间骨折人工关节置换模型,观察2种模型骨界面上的应力分布、关节假体上应力分布、整体应力和两模型的位移大小。结果与结论:(1)模型A的骨界面上最大应变值和最大应力值均大于模型B;模型A的假体最大应变值和最大应力值均大于模型B;模型A骨界面上和假体上应力采集点、中应力采集点和下应力采集点的平均应力值均高于模型B的平均应力值(P<0.05);(2)模型A的整体最大应力值和最小应力值均大于模型B;模型A的最大位移和最小位移均大于模型B;(3)结果表明,股骨矩骨折复位型老年股骨转子间骨折人工关节置换模型的最大应力和最大位移均大于股骨矩骨水泥重建型老年股骨转子间骨折人工关节置换模型,股骨矩骨水泥重建型老年股骨转子间骨折人工关节置换模型的应力分布更均匀,股骨矩骨水泥重建较股骨矩骨折复位效果好。
BACKGROUND： Calcar plays an important role in hip arthroplasty. The reconstruction of calcar includes bone cement reconstruction and restoration of fracture fragments, but there is some lack of knowledge about their comparative study. OBJECTIVE： To analyze the biomechanical characteristics of remodeled calcar using bone cement reconstruction and restoration of fracture fragments in senile intertrochanteric fractures through three-dimensional finite element models. METHODS： The remodeled calcar using restoration of fracture fragments （model A） or bone cement reconstruction （model B） in senile intertrochanteric fractures was obtained. The stress distribution on the bone interface and prosthesis the overall stress and displacement of the two models were observed. RESULTS AND CONCLUSION： （1） The maximal strain and stress on the bone interface and prosthesis of model A all were more than those of model B. The mean stresses at each node on the bone interface and prosthesis of model A all were significantly higher than those of model B （P 〈 0.05）. （2） The maximum stress and maximum displacement values of the model A all were higher than those of model B. （3） These results show that the maximal stress and displacement values of the remodeled calcar using restoration of fracture fragments are higher than those of bone cement reconstruction in senile intertrochanteric fractures; the latter holds even stress distribution and better repair outcomes.
出处
《中国组织工程研究》
CAS
北大核心
2017年第23期3616-3621,共6页
Chinese Journal of Tissue Engineering Research
基金
基金资助:河南省科学技术厅(142102110183)~~
