Distractor suitable for permanent implantation into bone
OwnerChristopher B. Gordoninventor
Life of this patent
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Abstract
The present invention relates to an osteogenic distractor suitable for indexed osteotomy following permanent implantation into bone. The osteogenic distractor may be a means for anchoring two or more sections of bone and a means for facilitating movement of one section of anchored bone relative to another section of anchored bone. Furthermore, the continuous tension on the bone produced by the distractor may facilitate stimulation of osteogenesis around the implant.
Claims23
An osteogenic distractor for distracting a first bone segment from a second bone segment suitable for indexed osteotomy following permanent implantation into bone, comprising:
- a first member anchored to said first bone segment;
- a second member anchored to said second bone segment;
- a screw for facilitating movement of said first member relative to said second member;
- and
- a spacer member made of bioabsorbable material configured to accept an indexed osteotomy through axes of said first and second members, said spacer having:
- a first surface initially contiguous with at least one surface of said first member, and
- a second surface initially contiguous with at least one surface of said second member.
An osteogenic implant and distractor assembly for indexed osteotomy and permanent implantation into bone, the assembly comprising:
- first and second axially aligned implant members having external surfaces configured to anchor to bone;
- a bioabsorbable spacer member aligned with and between said first and second implant members;
- a bioabsobable protective cap aligned with and positioned about a distal end of said second implant member;
- and
- an axial screw threaded through a threaded axial bore in said first implant member, an axial bore in said spacer member, a threaded axial bore in said second implant member and into a partial bore in said protective cap;
- wherein said spacer member is configured to accept an indexed osteotomy through the axes of said first and second members, said spacer comprising:
- a first surface initially contiguous with at least one surface of said first member, and
- a second surface initially contiguous with at least one surface of said second member.
A method for the distraction of bone comprising the steps of:
- providing a distractor assembly comprising a first member, a second member, a distraction screw in threaded engagement with the first and second members for causing movement of said first member relative to said second member, and a bioabsorbable spacer member having a first surface initially contiguous with a surface of said first member and a second surface initially contiguous with a surface of said second member when the distractor assembly is in an unextended state;
- placing said distractor assembly in an unextended state in a predetermined site where bone regeneration is required;
- backing said distraction screw out of said distraction device;
- performing an osteotomy through said bioabsorbable spacer member to form a distraction gap;
- replacing the distraction screw into threaded engagement with the first and second members following the osteotomy;
- and
- turning the distraction screw to extend said distractor assembly to widen said distraction gap.
Dependencies are inferred from the claim text.