Methods and instrumentation for vertebral interbody fusion
AssigneeSDGI Holdings, Inc.
InventorsJ. Kenneth Burkus, Eddie F. Ray, III, James P. Duncan
Life of this patent
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Abstract
Methods and instrumentation particularly adapted for disc space preparation for insertion of implants from an anterior approach to the spine are provided. The instruments include a guide sleeve defining a channel having overlapping cylindrical working channel portions and lateral non-distracting extensions extending from reduced thickness wall portions. The guide sleeve has an overall reduced width configuration. A pair of distractors are provided. A first distractor includes a shaft and distal tip, and the second distractor includes a shaft and distal tip. The first and second distractors can be used with the guide sleeve. Methods using the disclosed instruments are also provided.
Claims19
A spinal disc space distractor, comprising:
- a body positionable in a spinal disc space between adjacent vertebrae, said body having a distal end surface, a proximal end and a central axis extending therebetween, said body including:
- a lateral surface extending generally in the direction of said central axis;
- a medial surface opposite said lateral surface and extending generally in the direction of said central axis;
- an upper surface extending generally in the direction of said central axis;
- a lower surface opposite said upper surface and extending generally in the direction of said central axis;
- a first transition surface extending between said distal end surface and said lateral surface, said first transition surface having a first curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in an axial plane;
- a second upper transition surface extending between said lateral surface and said upper surface and a second lower transition surface extending between said lateral surface and said lower surface, said second upper and lower transition surfaces each having a second curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in a coronal plane;
- and
- a third upper transition surface extending between said distal end surface and said upper surface and a third lower transition surface extending between said distal end surface and said lower surface, said third upper and lower transition surfaces each having a third curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in a sagittal plane.
A spinal disc space distractor, comprising:
- a body positionable in a spinal disc space between adjacent vertebrae, said body having a central axis extending therethrough, said body including:
- a distal end surface;
- a lateral surface extending generally in the direction of said central axis;
- a medial surface opposite said lateral surface and extending generally in the direction of said central axis;
- an upper surface extending generally in the direction of said central axis;
- a lower surface opposite said upper surface and extending generally in the direction of said central axis;
- and
- at least a first transition surface extending between said distal end surface and said lateral surface, said first transition surface having a first curvature generally corresponding to a curvature of an inner portion of a cortical rim of vertebral endplates in an axial plane.
Dependencies are inferred from the claim text.