摘要
目的探讨股骨颈骨折内固定的方法,评价HZS型股骨颈膨胀式带锁加压钉(interlockingexpandingcompressivescrew,IECS)的生物力学性能。方法根据股骨颈骨折特殊的生物力学特性,设计制作由主钉、股骨头分叉钉、分叉钉推进螺帽、加压螺帽匀力垫、加压螺帽、斜向锁钉和主钉尾帽构成的股骨颈膨胀式带锁加压钉,以单枚双头加压螺钉(dynamiccompressivescrew,DCS)、双头加压子母螺钉(twincompressivescrew,2CS)和三枚空心加压螺钉(threecannulatedscrews,3CS)作对照组进行生物力学实验。结果IECS固定的股骨颈骨折在位移、轴向和水平剪切刚度、扭转强度和刚度、极限载荷等生物力学性能均明显优越于DCS、2CS和3CS。结论IECS能有效对抗骨折断端间的分离、扭转、剪切、张应力和压应力。结构轻巧,操作简便,安全可靠。
Objective To explore the methods of internal fixation for femoral neck fractures and evaluate the biomechanical characteristics of the interlocking expanding compressive screw (IECS)of Type HZS. Methods Based on the special biomechanical characteristics of the femoral neck fracture, the device of internal fixation was designed to consist of main screw, bifurcate screw, boost screw cap, washer, compressive screw cap, oblique interlocking screw and main screw cap. Its biomechanical performances were evaluated through comparison with those of the dynamic compressive screw (DCS), twin compressive screw (2CS) and three cannulated screws (3CS) respectively. Results The mechanical performances of the femoral neck fracture fixed with the interlocking expanding compressive screw were superior to those of the others in displacement ,axial and level stiffness, torsional strength and stiffness and terminal loading. Conclusion Interlocking expanding compressive screw can efficiently withstand the splitting, torsional, shearing, tensional and compressive forces in the fracture, and is simple, safe and easy to use. [
出处
《中华创伤骨科杂志》
CAS
CSCD
2003年第3期222-224,共3页
Chinese Journal of Orthopaedic Trauma
关键词
股骨颈
膨胀式带锁加压钉
生物力学
内固定
骨折
Femoral neck fracture
Internal fixation
Interlocking expanding compressive screw
Biomechanics
