CAJ | 학술논문

[目的] 测试股骨小转子缺损及复位固定对股骨上端生物力学性能的影响,探讨股骨转子间骨折小转子固定的必要性.[方法] 采集国人新鲜股骨上段标本,模拟骨折造成股骨小转子缺损和股骨小转子广泛缺损以及重新将小转子复位螺钉固定,分别测量股骨上端的强度、刚度和扭转力学性能.[结果] 股骨小转子缺损和广泛缺损会导致股骨应力集中,强度分别增加31%、37%;股骨刚度分别下降29%、51%;股骨抗扭强度分别下降33%、54%.小转子固定后则应力集中下降25%、28%,刚度提高20%、31%,抗扭强度增加23%、29%,力学性能明显恢复.[结论] 股骨小转子缺损或广泛缺损,导致股骨抵御外载荷及抗扭力学性能显著下降.提示股骨转子间骨折治疗中小转子固定是不容忽视的因素.
[목적] 측시고골소전자결손급복위고정대고골상단생물역학성능적영향,탐토고골전자간골절소전자고정적필요성.[방법] 채집국인신선고골상단표본,모의골절조성고골소전자결손화고골소전자엄범결손이급중신장소전자복위라정고정,분별측량고골상단적강도、강도화뉴전역학성능.[결과] 고골소전자결손화엄범결손회도치고골응력집중,강도분별증가31%、37%;고골강도분별하강29%、51%;고골항뉴강도분별하강33%、54%.소전자고정후칙응력집중하강25%、28%,강도제고20%、31%,항뉴강도증가23%、29%,역학성능명현회복.[결론] 고골소전자결손혹엄범결손,도치고골저어외재하급항뉴역학성능현저하강.제시고골전자간골절치료중소전자고정시불용홀시적인소.
[Objective]To test the biomechanical performance effect on the upper femur under conditions of the defect of femur lesser trochanter and replacement and fixation;and to discuss the necessity of lesser trochanter fixation of femoral intertrochanteric fracture.[Method]Some specimens of the upper sections of fresh Chinese femurs were collected. Through simulating fracturing,some defect and even broader defect of the lesser trochanter were caused. The lesser trochanter was fixed. Last, the strength, rigidity and the twisting force of the upper section of the femur were measured respectively.[Result]The defect and even broader defect of femur lesser trochanter would cause stress concentration of femurs.The strength increased 31% and 37% respectively while the rigidity reduced 29% and 51% respectively and the anti-twisting strength reduced 33% and 54%. After the lesser trochanter had been fixed, the stress concentration would reduce 25% and 28%, the rigidity would increase 20% and 31%, and the anti-twisting strength would increase 23% and 29%. The mechanical performance would be obviously recovered. [Conclusion]The defect and broader defect of the femur lesser trochanter will cause significant decrease in the mechanical performance of the femur when resisting external load and twisting. In the treatment of the femoral intertrochanteric fracture,the fixation of the lesser trochanter is an important factor.