硫酸钙骨水泥增强骨质疏松股骨粗隆间骨折内固定的有限元分析  

Finite-Element Analysis of Injectable Calcium Sulfate Bone Cement Augmentation with Dynamic Hip Screw System for the Treatment of Osteoporotic Intertrochanteric Fractures

作　　者：于晓巍[1] 王楠[1] 汤亭亭[1] 

机构地区：[1]上海交通大学医学院附属第九人民医院,上海200011

出　　处：《上海交通大学学报》2009年第11期1813-1817,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(10872131);上海市科委项目(08411950500;09dz2200400);上海市骨科内植物重点实验室建设基金资助项目(08DZ2230330)

摘　　要：通过有限元分析,研究硫酸钙对稳定型骨质疏松股骨粗隆间骨折内固定增强的影响.建立骨质疏松股骨稳定型粗隆间骨折有限元模型,模拟动力髋螺钉(DHS)固定及硫酸钙增强的DHS固定,分析硫酸钙对DHS固定的增强效果.有限元分析显示,硫酸钙增强后,股骨头部的松质骨最大应力减少了35%,提示螺钉切割出股骨头的可能性减小;而股骨骨折面最大应力从3.7 MPa减少到1.8 MPa,提示硫酸钙增强提高了DHS固定的稳定性.研究结果表明,硫酸钙骨水泥能有效增强骨质疏松性骨折内固定的稳定性,具有较好的临床应用前景.The mechanical performance of the dynamic hip screw （DHS） system augmented with calcium sulfate bone cement （CSC） for the fixation of stable osteoporotic intertrochanteric fracture was evaluated by means of finite element analysis （FEA）. Finite element model was used to simulate the stable osteoporotic intertrochanterie fracture with DHS fixation or DHS fixation plus CSC augmentation and the stress distribution was analyzed. With cement augmentation, 35 % reduction of the maximum stress was found in the femur head, suggesting reduced possibility of screw cut-outs. Maximum stress at the fracture plane was also decreased from 3.7 MPa to 1.8 MPa, which indicates improved fixation after CSC augmentation. These results indicate that calcium sulfate cement is effective in augmenting fixation in osteoporotic bone. Calcium sulfate cement has potential application in the treatment of osteoporotic fractures.

关 键 词：股骨粗隆间骨折 骨折固定 骨增强 骨质疏松症 有限元分析 

分 类 号：R683.42[医药卫生—骨科学]