刻槽针内固定治疗股骨颈骨折生物力学研究与临床应用

Troughed pins treatment of femoral neck fracture——a biomechanicl study and clinical application

目的验证刻槽针治疗股骨颈骨折较普通斯氏针更具有锚固性。方法通过生物力学试验，采用均质木块与牛股骨按骨折固定方式钉入４ｍｍ斯氏针与刻槽针，置弹簧拉力试验机上进行拔出力对比。并将刻槽针临床应用于５０例股骨颈骨折的治疗。结果斯氏针在木块上平均拔出力为１０．２ｋｇ，刻槽针为２１．００ｋｇ，为斯氏针的２倍；斯氏针在牛股骨上的平均拔出力为５．７ｋｇ，刻槽针为１４．５ｋｇ，为斯氏针的２．４５倍。刻槽针临床应用效果良好。结论刻槽针治疗股骨颈骨折较斯氏针固定牢固，临床应用证实无脱针。

Objective To testify whether treating femoral neck fracture with troughed pins is more secure than that with Steinmann pins. Methods 4 mm Steinmann pin and troughed pin were wedged into wood lumps and ox bones for traction and the traction power of both pins was compared. The troughed pins were applied to treat 50 patients with femoral neck fracture. Results Steinmann pin was pulled out from wood by strength of 10 2 kg. As for troughed pin, it was 21 0 kg, 2 06 times as heavy as Steinmann pin. Steinmann pin was pulled out from ox bone by strength of 5 7 kg. As for troughed pin, it was 14 5 kg, 2 54 times as heavy as Steinmann pin. Conclusion Troughed pins are firmer and have stronger fixity than Steinmann pins in treating femoral neck fracture, and no pins are slipped or broken.