Rod-cord dynamic connection assemblies with slidable bone anchor attachment members along the cord
OwnerRoger P. Jacksoninventor
Life of this patent
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Abstract
A dynamic fixation medical implant having at least two bone anchors includes a longitudinal connecting member assembly having a core portion made from at least one pre-tensioned flexible member and a cooperating pre-compressed surrounding outer sleeve. The sleeve surrounds the core and is disposed between cooperating rigid end members that are attached to the bone anchors.
Claims20
In a medical implant assembly having at least first and second bone anchors cooperating with a longitudinal connecting member, the improvement wherein the connecting member comprises:
- a) a first substantially solid connecting member portion for attachment to the first bone anchor, the first connecting member having at least a pair of spaced apertures;
- b) a second connecting member portion for attachment to the second bone anchor;
- and
- c) a transition portion disposed between the first and second connecting member portions, the transition portion having at least one flexible tie looped through the pair of spaced apertures of the first connecting member portion.
In a medical implant assembly having at least two bone attachment structures cooperating with a longitudinal connecting member, the improvement wherein the connecting member comprises:
- a transition portion disposed between the bone attachment structures, the transition portion having
- a) at least one substantially rigid portion with at least a pair of spaced apertures;
- and
- b) at least one elongate tie extending through the apertures, the tie being in tension prior to attachment of the rigid portion to the bone attachment structure.
In a medical implant assembly having at least first and second bone anchors cooperating with a longitudinal connecting member, the improvement wherein the connecting member comprises:
- a) first and second rigid ends, the first rigid end coupled to the first bone anchor, the first rigid end extending completely through the first bone anchor;
- the second rigid end coupled to the second bone anchor, the second rigid end extending completely through the second bone anchor;
- b) a pre-tensioned non-metallic flexible core positioned between the first and second rigid ends and coupled to both the first and second rigid ends;
- and
- c) a pre-compressed elastomer completely surrounding the flexible core.
Dependencies are inferred from the claim text.