骨水泥强化正常骨质动力髋螺钉固定的生物力学研究  

BIOMECHANICAL EVALUATION OF DYNAMIC HIP SCREW WITH BONE CEMENT AUGMENTATION IN NORMAL BONE

作　　者：黎宁[1] 彭阿钦[2] 柴仪[3] 曹晶[4] 刘勇[5] 郭锐[6] 韩长伶 

机构地区：[1]石家庄市第三医院骨科,石家庄050011 [2]河北医科大学第三医院骨科创伤急救中心 [3]河北医科大学中医院骨科 [4]中国协和医科大学研究生院 [5]河北大学附属医院骨科 [6]邢台市人民医院骨科 [7]河北省骨科研究所

出　　处：《中国修复重建外科杂志》2007年第12期1299-1301,共3页Chinese Journal of Reparative and Reconstructive Surgery

基　　金：河北省卫生厅科研基金资助项目(2005064)~~

摘　　要：目的选取正常骨密度的股骨转子间骨折标本,研究骨水泥强化对动力髋螺钉(dynamic hip screw,DHS)固定的生物力学影响。方法取成年男性防腐尸体双侧股骨上段标本24对48侧,制备A2型股骨转子间骨折DHS固定模型。右侧标本行骨水泥强化DHS固定,为强化组;左侧行DHS常规固定,为对照组。两组标本进行弯曲强度实验及扭转强度实验。结果强化组最大负荷及最大扭矩分别为3852.1602±143.6031N、15.5±2.6Nm,对照组为3702.9667±133.8601N、14.7±3.4Nm;两组比较生物力学差异均无统计学意义(P>0.05)。结论正常骨密度的股骨转子间骨折行骨水泥强化,对DHS固定强度及骨折整体稳定性无显著影响。Objective To investigate the effects of augmentation with bone cement on the biomechanics of the dynamic hip screw （DHS） fixation in the intertrochanteric fracture specimen that has a normal bone density. Methods Twenty-four matched pairs of the embalmed male upper femora （48 sides） were used to make the specimens of the intertrochanteric fracture of Type A2. All the specimens were fixed with DHS. The right femur specimen from each pair was fixed by augmentation with DHS （the augmentation group） and the left femur specimen was fixed with the conventional fixation （the control group）. The biomechanical tests on the bending stiffness and the torsional stiffness were performed with the servohydraulic testing machine in the two groups. Results The maximum load and the maximum torque were 3 852. 160 2± 143. 603 1 N and 15.5± 2.6 Nm in the augmentation group and 3 702. 966 7± 133. 860 1 N and 14.7±3.4 Nm in the control group. There was no significant difference in the biomechanical effects between the two groups （P^0.05）. Conclusion The augmenting fixation with bone cement in the intertrochanteric fracture specimen with a normal bone density has no significant effect on the strength of the DHS augmentation or on the overall stability of the fractured bone.

关 键 词：股骨 转子间骨折 动力髋 骨水泥 生物力学 

分 类 号：R687[医药卫生—骨科学] R318.01[医药卫生—外科学]