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.
正如多数研究所提到的拉力螺钉的一个主要优点是反向滑动机制，能在负重条件下对骨折施加控制性加压，促进骨折的愈合。
There were no significant differences in fracture alignment, hip screw position, tip-apex distance, union rate, time to healing or complication rate.
在骨折对线，螺钉位置，尖顶距，愈合率，愈合时间和并发症发生率方面无显著差异。
The utility model belongs to a medical bone wall reamer which is suitable for reaming a bone wall before extracting a left screw after the healing of all kinds of fracture damage.
本实用新型属于医用骨壁扩孔器，适合于各类骨折损伤愈合后需取出残留螺钉前作骨壁扩孔用。
应用推荐