| 摘要 |
An anti-splay closure with a left handed threaded removal bore, includes a cylindrical closure body with an external, continuous, helically extending anti-splay guide and advancement flange and a breakaway installation head. The removal bore is aligned with an axis of the closure body. The bore thread is sized and shaped to receive a removal tool having mating left handed thread. The closure is used with an open headed bone implant screw which is provided with internal, helically extending mating guide and advancement , structure complementary to the flange of the closure body. |
