【摘要】 目的 :了解三种应用于股骨粗隆间骨折的内固定材料的抗弯能力 ,及其对股骨粗隆至股骨头内骨小梁的损伤程度。方法 :使用型号为MTS810试验机对三种内固定物进行抗弯试验 ,用量筒测量三种内固定物近端体积。在近端臂体积的测量中 ,分为近端全长及近端 5 0mm的体积测量。结果 :在抗弯试验中麦氏鹅头钉平均承受压力为 44.6 1kg ,130°角钢板平均承受压力为 81.5 3kg ,加压滑动鹅头钉 (又称动力髋螺钉 ,Dynamichipscrew ,DHS)平均承受压力为2 77.43kg。在近端臂的两部分体积测量中 ,麦氏鹅头钉与 130°角钢板体积较小。结论 :麦氏鹅头钉的抗弯力最小 ,承重能力最小。患肢不能早期负重功能锻炼 ,DHS抗弯力最大 ,承重能力最大。患肢可早期负重功能锻炼。 130°角钢板介于二者之间。而麦氏鹅头钉及 130°角钢板近端体积小 ,表明对粗隆至股骨头间骨小梁损伤小。而DHS损伤大更多还原

【Abstract】 Objective: To understand the bearing capacity and injuring to the bone about three kinds of internal fixture for treating of the intertrochanteric fracture.Methods:The anti bending test is done with a machine (MTS810),and the volume of proximal arm is measured with a graduate.We divided the proximal arm into two parts whole length and proximal 50mm length,to measure the volume.Results:In the anti bending test,the average pressure they can bear is Less than 44.61kg on McLaughlin’s nailplate,81.53kg on 130degree blat plate,227.43kg on Dynamic hip screw(DHS).The volume of McLaughlin’s nail plate and 130degress blad plate are less,and that of DHS is the largest.Conclusion:The pressure born by the McLaughlin’s nail plate is the least,so the operated hips can not bear weight and can not do the functional exercise at the early stage after operation.The pressure born by DHS is the most,so the operated hips can bear weight and do the functional exercise at the early stage after operation.130degree blad plate is the middle.The proximal arm of the McLaughlin’s nail plate and 130degree blat plate breaks the neck of femur and the intertrochanteric region less,but DHS breaks them more.更多还原