| 摘要 |
<p>An open implant closure structure includes a helically wound guide and advancement structure having at least two helically wound forms thereon providing a multi- start closing mechanism for use between spaced arms of a cooperating open medical implant having mating helically wound structure thereon. Illustrated structures include interlocking flange forms, v-threads, square threads, reverse angle threads and buttress threads and receivers with break-off extensions and cooperating tooling.</p> |
