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As it is mentioned in many studies that one major advantage of the backward sliding mechanism of lag screw is controlled compression of fracture with weight bearing which helps in healing of fracture. 正如多數(shù)研究所提到的拉力螺釘?shù)囊粋€(gè)主要優(yōu)點(diǎn)是反曏滑動(dòng)機(jī)制，能在負(fù)重條件下對(duì)骨折施加控制性加壓，促進(jìn)骨折的瘉郃。