治疗股骨颈骨折的自锁空心加压防旋钉的研制

Development of self-locking cannulated compression anti-rotation blade for treatment of femoral neck fractures

目的探讨自锁空心加压防旋钉的设计特点和操作技术。方法采用7具尸体骨标本，截骨制作股骨颈骨折模型，按照设计的操作步骤应用白锁空心加压防旋钉进行固定，操作过程在X线监视下进行；固定后标本进行生物力学检测。结果自锁空心加压防旋钉紧密嵌入股骨近端，锁定时有加压作用，操作顺利，骨折固定稳定。结论自锁空心加压防旋钉设计先进，操作简单，可替代空心松质骨拉力螺钉。

Objective To develop self-locking cannulated compression anti-rotation blade and investigate its design characteristic and manipulation techniques. Methods Femoral neck fracture model was made by osteotomy on seven cadaver femurs and then fixed by self-locking cannulated compression anti-rotation blade under fluoroscopic guidance according to designed procedures. After fixation, biomechanic test was performed to evaluate fixation stability. Results Cannulated self-locking compression anti-rotation blade was tightly impacted in proximal femur and compression detected during the process of locking, with successful manipulation and stable fixation. Conclusion Because of advanced design characteristic and simple manipulation, self-locking cannulated compression anti-rotation blade can be a substitute for cannulated cancellous lag screw in treatment of femoral neck fractures.