中空双头螺纹加压钉固定股骨颈骨折的生物力学实验研究与临床应用

AN EXPERIMENTAL STUDY OF BIOMECHANICAL PRINCI-PLE AND CLINICAL APPLICATION OF TREATING FEMOR-AL NECK FRACTURE WITH HOLLOW DOUBLE HEAD COMPRESSION SCREWS

取９具成年新鲜股骨尸标本，采用中空双头螺纹加压钉固定股骨颈骨折，进行生物力学实验。结果表明，采用三枚中空双头螺纹加压钉固定股骨颈骨折，是一个十分有效的内固定方法，它比实心螺纹钉、三翼钉在抗压、抗弯、抗扭强度和刚度上占有一定的优势。（ｐ＜０．０１）。临床２２例实践证明，这种内固定方法能加速骨折愈合，功能恢复较快，是一种符合生物力学原理的理想内固定器械，值得推广应用。

Each of the femoral neck fracture of 9 fresh cadaver femora samples was fixed with 3 hollow doublehead compression screws. Biomechanical experiment showed that hollow double head compressionscrew is a more effective internal fixation devise in the treatment of femoral neck fracture. The 3hollow double head compression screw method appeaed to have distinct advantages over themethods by using 3 solid screws or trifin screws in anti-pressure, anti-bending, torsional strengthand torsional rigidity. Statistical analysis showed signigicant difference(p<0.01). Hollow doublehead compression screw method has been performed on 22 patients, and proved to be able to speedup bone formation and recovery of hip or knee joint function after operation. At present, it isdlemed a relatively ideal fixation method in the treatment for fracture of femoral neck. It deserveswides application and more more popularization.