Multi-piece intervertebral implants
AssigneeBala Sundararajan
InventorJennifer Klimek
Life of this patent
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Abstract
Intervertebral implants for implanting into an intervertebral space are provided. The implants can comprise one or more layers that are operably attached to one another. An implant can comprise a first layer having a first mating surface that mates with a second mating surface of a second layer. The first mating surface and the second mating surface can have features that allow them to complement each other. The implants can include one or more bore holes for receiving a fixation member. The bore holes can be horizontal, vertical or diagonal. In some cases, the bore holes will be blind bore holes.
Claims20
A multi-piece spacer unit comprising:
- an upper spacer having an upper central hole, an upper surface, a lower surface, a first through hole extending between the upper and lower surfaces, and a first blind hole extending upwardly from the lower surface;
- a lower spacer having a lower central hole, a lower surface, an upper surface, a second through hole extending between the upper and lower surfaces, and a second blind hole extending downwardly from the upper surface;
- a first pin extending through the first through hole and the second blind hole;
- a second pin extending through the second through hole and the first blind hole,
- a third pin extending into the upper spacer and the lower spacer;
- and
- a fourth pin extending into the upper spacer and the lower spacer,
- wherein the lower surface of the upper spacer and the upper surface of the lower spacer are flat along an entirety of a latitudinal axis of the spacer unit.
A multi-piece allograft spacer unit comprising:
- an upper allograft spacer having an upper central hole, an upper surface, a lower surface, a first through hole extending between the upper and lower surfaces, and a first blind hole extending upwardly from the lower surface;
- a lower allograft spacer having a lower central hole, a lower surface, an upper surface, a second through hole extending between the upper and lower surfaces, and a second blind hole extending downwardly from the upper surface, the upper and lower allograft spacers formed of bone material;
- a first pin extending through the first through hole and the second blind hole;
- a second pin extending through the second through hole and the first blind hole;
- a third pin extending into the upper spacer and the lower spacer;
- and
- a fourth pin extending into the upper spacer and the lower spacer,
- wherein the lower surface of the upper spacer and the upper surface of the lower spacer are flat along an entirety of a latitudinal axis of the spacer unit.
Dependencies are inferred from the claim text.