Dynamic stabilization connecting member with molded connection

摘要

A dynamic fixation medical implant having at least two bone anchors includes a longitudinal connecting member assembly having at least one transition portion and cooperating outer sleeve, both the transition portion and sleeve being disposed between the two bone anchors. The transition portion includes a rigid length or rod having apertures therein and a molded plastic length that extends through the apertures, thus attaching the plastic length to the rigid length. The sleeve surrounds the transition portion and extends between the pair of bone anchors, the sleeve being compressible in a longitudinal direction between the bone anchors.

主权项

1. In a medical implant assembly having at least first and second attachment structures cooperating with an elongate longitudinal connecting member, the improvement wherein the connecting member comprises:
a) a rigid rod portion secured within the first bone attachment structure; b) an elongate polymer co-axially connected to the rod portion near an outer end thereof, the elongate polymer cooperating with the bone attachment structures to provide movement between the structures, the elongate polymer being held in tension between the first and second bone attachment structures; and c) an outer compressible sleeve being positioned between the first and second bone attachment structures and providing surrounding support for the elongate polymer and cooperating bone attachment structures, the sleeve at least partially covering the rigid rod portion co-axially connected to the elongate polymer.