中文摘要：

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.

英文摘要：

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.