Instruments and techniques for disc space preparation
First Claim
1. A medical instrument for preparation of a disc space between adjacent vertebrae of a patient, comprising:
- a burr assembly adapted to matingly engage a window assembly that is coupled to between the adjacent vertebrae, said burr assembly including a guide housing having a cutting slot defined therein, and a guide assembly pivotally linked to said guide housing, said guide assembly being adapted to guide a cutting piece in said cutting slot while maintaining alignment of said cutting piece.
2 Assignments
0 Petitions
Accused Products
Abstract
A series of instruments (30, 80, 120, 210, 510, 550) are provided for direct-anterior and oblique-anterior disc space and end plate preparation. The instruments (30, 80, 120, 210, 510, 550) provide precise guidance for channel formation in the vertebral endplates by guiding rotating and bladed cutting instruments (122, 250, 580). Instrumentation (550) for oblique-anterior disc space preparation includes compound angulation to account for the angle of approach to the spine and the angulation between adjacent vertebrae. Methods and techniques for use of the instruments (30, 80, 120, 210, 510, 550) are also described.
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Citations
43 Claims
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1. A medical instrument for preparation of a disc space between adjacent vertebrae of a patient, comprising:
a burr assembly adapted to matingly engage a window assembly that is coupled to between the adjacent vertebrae, said burr assembly including a guide housing having a cutting slot defined therein, and a guide assembly pivotally linked to said guide housing, said guide assembly being adapted to guide a cutting piece in said cutting slot while maintaining alignment of said cutting piece. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 19)
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11. A medical instrument for preparation of a disc space between adjacent vertebrae of a patient, comprising:
a cutting blade guide adapted to matingly engage a window assembly that is coupled to between the adjacent vertebrae, said guide having a blade channel defined therein adapted to receive a cutting blade, said blade channel having a guide channel adapted to receive a guiding rib on said cutting blade to maintain alignment of said cutting blade. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 20)
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21. A medical instrument for preparation of a disc space between adjacent vertebrae of a patient, comprising:
a distractor including a distraction head adapted to distract the adjacent vertebrae from an oblique approach with respect to a sagital plane of the patient, said distraction head having a first leading edge and a second angled leading edge, said second leading edge being obliquely angled with respect to said first leading edge, wherein said first leading edge and said second leading edge each have adjoining upper and lower tapered surfaces. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A medical instrument for preparation of a disc space between adjacent vertebrae of a patient, comprising:
a distraction window adapted to engage the adjacent vertebrae from an oblique approach with respect to a sagital plane of the patient, said distraction window including a working channel defined therein and opposing distraction projections extending therefrom, said distraction window further including an upper bone engaging surface and a lower bone engaging surface with each having a concave engagement surface with an offset radius of curvature. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
Specification