Dynamic stabilization assembly with frusto-conical connection
OwnerRoger P. Jacksoninventor
Life of this patent
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Abstract
A dynamic fixation medical implant for attachment to at least two bone anchors includes a longitudinal connecting member assembly having first and second rigid sections, at least one section having a convex or frusto-conical surface held in spaced relation with the other section by an elastic spacer. The spacer may be an over-mold that connects the first and second rigid sections. Some embodiments include an inner, tougher spacer and a separate over-molded spacer.
Claims23
In a medical implant assembly having at least two bone attachment structures cooperating with a longitudinal connecting member, the improvement wherein the longitudinal connecting member comprises:
- a) a first substantially rigid longitudinal connecting member section having a central axis, the first section having a first bone anchor attachment portion and an end portion tapering towards the central axis;
- b) a second substantially rigid longitudinal connecting member section having a second bone anchor attachment portion;
- and
- c) a polymer structure spanning between and attached to both the first and second sections, the polymer structure incorporating the tapered end portion of the first section.
In a medical implant assembly having at least two bone attachment structures cooperating with a longitudinal connecting member, the improvement wherein the longitudinal connecting member comprises:
- a) a first substantially rigid longitudinal connecting member section having a central axis, the first section having a first bone anchor attachment portion and an end portion tapering towards the central axis;
- b) a second substantially rigid longitudinal connecting member section having a second bone anchor attachment portion;
- and
- c) a polymer structure spanning between and supporting the first and second sections, the polymer structure at least partially surrounding the tapered end portion of the first section.
In a medical implant assembly having at least two bone attachment structures cooperating with a longitudinal connecting member, the improvement wherein the longitudinal connecting member comprises:
- a) a first substantially rigid longitudinal connecting member section having a central axis, the first section having a first bone anchor attachment portion and an end portion narrowing towards the central axis;
- b) a second substantially rigid longitudinal connecting member section having a second bone anchor attachment portion;
- and
- c) a polymer structure spanning between and supporting the first and second sections, the polymer structure at least partially surrounding the narrowed end portion of the first section.
Dependencies are inferred from the claim text.