Laminoplasty implants and methods of use
OwnerChristopher M. Angelucci, Michael L. Boyer, II +4inventors
InventorsChristopher M. Angelucci, Michael L. Boyer, II, David C. Paul, Christopher J. Ryan, Amit Sinha, Martin Walter
Life of this patent
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Abstract
Implants for use in the spinal column are disclosed. The implants comprise a bone allograft coupled with a non-allogenic plate. The plate has ends that fasten to opposing spine segments, and an intermediate portion that engages the allograft using deformable fingers, or with a hollow portion sized to receive and hold part of the allograft, or with fixed tabs. Methods of using the implants are also disclosed.
Claims32
An implant for use in the spinal column, the implant comprising:
- (a) an allograft fabricated from cancellous bone material and having a length,
- (b) a structual member formed of non-allograft material having first and second bone engaging portions, and an allograft engaging portion, wherein said allograft engaging portion is configured to retain the allograft when the allograft contacts the graft engaging portion, and wherein the member contacts the allograft along a substantial portion of the length of the allograft.
An implant for use in maintaining a desired distance between a first spinal bone having a first outer surface and a first cut bone end, and a second spinal bone having a second outer surface and a second cut bone end, said implant comprising:
- (a) an allograft having a body, the body having first and second ends,
- (b) a plate formed of non-allograft material having an intermediate portion and first and second ends, said intermediate portion having an allograft engaging portion configured to retain the allograft, said first and second plate ends comprising bone engaging portions, having fastener receiving portions,
- wherein the allograft engaging portion is configured and adapted to engage the allograft body and the bone engaging portions are adapted and configured to engage the first and second bone outer surfaces and the allograft first and second ends are adapted and configured to contact the first and second cut bone ends, and wherein at least a portion of at least one of the bone engaging portions is deformable to allow shaping to the surface of the respective bone.
A method of providing a desired distance between first and second cut bone ends of the spine, comprising the steps of:
- (a) cutting at least one segment of a vertebra to produce first and second cut bone ends;
- (b) separating the first and second cut bone ends to define a space therebetween;
- (c) providing an allograft having a body, the body having first and second ends;
- (d) providing a plate formed of a non-allograft material having an intermediate portion and first and second ends, said intermediate portion having an allograft engaging portion configured to retain the allograft, said first and second plate ends comprising bone engaging portions, having fastener receiving portions,
- wherein the allograft engaging portion is configured and adapted to engage the allograft body and the bone engaging portions are adapted and configured to engage the first and second outer surfaces and the allograft first and second ends are adapted and configured to contact the first and second cut bone ends;
- (e) engaging the allograft engaging portions with the allograft;
- (f) engaging said bone engaging portions with said first and second cut bone ends;
- (g) deforming at least one bone engaging portion to conform to the outer surface of its respective cut bone segment;
- (h) providing at least two bone fasteners;
- (i) inserting at least one said bone fastener into the fastener receiving portion of each bone engaging portion;
- and
- (j) engaging the at least one bone fasteners with said cut bone ends.
An implant for use in a laminoplasty procedure, the implant comprising:
- (a) an allograft fabricated from cancellous bone material,
- (b) a member formed of non-allograft material having first and second bone engaging portions and an allograft engaging portion, wherein said allograft engaging portion is configured to retain the allograft when the allograft contacts the allograft engaging portion, and wherein said bone engaging portions are configured to engage first and second bone ends produced during a laminoplasty procedure.
An implant for use in the spinal column, the implant comprising:
- (a) an allograft fabricated from cancellous bone material,
- (b) a member formed of non-allograft material having first and second bone engaging portions and an allograft engaging portion, wherein said allograft engaging portion is configured to retain the allograft when the allograft contacts the allograft engaging portion, and wherein at least a portion of said allograft engaging portion is deformable to allow shaping the allograft engaging portion to at least partly conform to the surface of the allograft.
A method of providing a desired distance between first and second cut bone ends produced during a laminoplasty procedure, comprising the steps of:
- (a) performing a laminoplasty procedure to produce first and second cut bone ends of a single vertebra, each bone end having an outer bone surface;
- (b) separating the first and second cut bone ends to define a space therebetween;
- (c) providing an allograft having a body, the body having first and second ends;
- (d) providing a plate formed of a non-allograft material having an intermediate portion and first and second ends, said intermediate portion having an allograft engaging portion configured to retain the allograft, said first and second plate ends comprising bone engaging portions,
- wherein the allograft engaging portion is configured and adapted to engage the allograft body and the bone engaging portions are adapted and configured to engage respective outer bone surfaces of the cut bone ends and the allograft first and second ends are adapted and configured to contact the first and second cut bone ends;
- (e) engaging the allograft engaging portion with the allograft;
- and
- (f) engaging said bone engaging portions with said first and second cut bone ends.
Dependencies are inferred from the claim text.