| 摘要 |
<p>A closure(6)for an open headed medical implant,such as a bone screw(5).The closure(6)having a cylindrical body(35)having an axis of rotation and also has a threaded,radial outer surface(40).The body(35)has a plurality of bores(44,45,46)that open onto a top surface of the body and that are parallel to but spaced from the axis of rotation.In one embodiment the closure(106)also has a break−off head(36)centrally attached by a neck(54)to the top surface of the body(135).Preferably,the body(135)also includes an axial,threaded bore(161)that extends from a bottom to the top of the surface body,but that is only exposed when the break−off head(36)breaks away.In another embodiment,a tool(180)is used to insert the closure(106)in the implant without a break−off head(36)and a central,threaded bore(161)of the closure(106)receives a set screw(108).</p> |
