Interbody fusion implants and instrumentation
AssigneeSDGI Holdings, Inc.
InventorsCharles L. Branch, Mingyan Liu, Lawrence M. Boyd, Loic Josse
Life of this patent
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Abstract
This invention relates to implants formed from donor bone for use in lumbar interbody fusion procedures and instruments for performing such procedures. The implants are formed to include a concave surface formed from a portion of the medullary canal of a long bone. The concaved surface defines a recess in the implant that serves as a depot for osteogenic material. Specific instruments for inserting the implants prepared according to this invention and for preparing the intervertebral space to receive the implants are also provided.
Claims7
A chisel for cutting tissue from a first inferior surface of a first vertebrae and an opposing second superior surface of a second vertebrae adjacent to the first vertebrae, the chisel comprising:
- a shaft having a first end and an opposite second end;
- and
- a cutting head mounted on the second end of the shaft, the cutting head including a first non-cutting edge attached to a first arm, a second non-cutting edge attached to an opposite second arm and a first cutting blade and a second cutting blade disposed between said first and second arms wherein said first non-cutting edge and said second non-cutting edge extend distally beyond said first and second cutting blades, thereby contacting the first inferior surface and the second superior surface to guide the first and second cutting blades.
A surgical kit comprising:
- a chisel comprising a shaft having a first end defining a cutting head, the cutting head including a first non-cutting edge attached to a first arm, a second non-cutting edge attached to an opposite second arm and a first cutting blade and a second cutting blade disposed between said first and second arms wherein said first non-cutting edge and said second non-cutting edge extend distally beyond said first and second cutting blades;
- a nerve retractor assembly comprising, a retractor blade;
- a retractor body adapted for unobstructed view of the retracted area wherein the retractor body is provided with a channel adapted to receive the retractor blade;
- and,
- a round scraper including an elongate shaft defining a longitudinal axis, said round scraper comprising a first arm extending from the shaft in a direction substantially parallel to the longitudinal axis, a second arm extending from the shaft and spaced from the first arm, wherein the first arm and the second arm define a cavity therebetween, and a tip disposed between the first arm and the second arm wherein the tip includes a first upper cutting edge and a second lower cutting edge and a curved surface disposed between the first cutting edge and the second cutting edge.
Dependencies are inferred from the claim text.