角状钢板固定股骨粗隆部骨折的生物力学观察

Biomechanical observation on unstable intertrochanteric fracture fixed by 130° angled plate

作者通过生物力学实验方法，测试了１３０°角状钢板固定不稳定型股骨粗隆部骨折的稳定性，同时通过电测法对内固定自身应力状态进行观察。结果表明，３００次循环加载后骨折的稳定性受到一定程度的破坏。应变观察结果显示钢板自身存在着较严重的应力集中现象，说明钢板的力学状态欠合理。作者认为，使用角状钢板固定不稳定型粗隆间骨折时，常不能获得满意效果，至少不应早期负重。

We examined the stability of unstable intertrochanteric fracture fixed by 130° angled plate biomechanically,and the stress distribution of the plate.The results showed that after 300 times circle loading test,the fracture stability was destroied.Stress concentration was observed on the plate,which was aggravated by circle loading test.These confirmed the inproper biomechanical stature of the plate.Referring to the clinical review,we conclude that using angled plate to fix unstable intertrochanteric fracture hardly yields satisfactory results,at least,early wight bearing exercise should not be promoted.