Instruments and techniques for disc space preparation
First Claim
Patent Images
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 includinga guide housing having a cutting slot defined therein, anda 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.
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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
24 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, 11, 12, 13, 14, 15)
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16. 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 adapted to fit within said window assembly, said guide assembly having a cutting slot defined therein opening proximally and distally in said guide housing; and a guide assembly including a post engaged at a distal end to said guide housing and extending proximally from said guide housing, said guide assembly including a linkage rotatably received about said post, said linkage including a guide tube extending therealong, said guide tube including a distal end position in said cutting slot and being movable along said cutting slot across said guide housing by rotating said linkage about said post. - View Dependent Claims (17, 18, 19, 20, 21)
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22. 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 extending proximally and distally along a longitudinal axis, said guide housing having a cutting slot thereacross and opening proximally and distally through said guide housing in a direction of said longitudinal axis, said cutting slot forming an angle relative to said longitudinal axis in the proximal and distal directions; and a guide assembly pivotally linked to said guide housing, said guide assembly being adapted to guide a cutting piece in said cutting slot to cut an endplate of the adjacent vertebrae at said angle while maintaining alignment of said cutting piece at said angle. - View Dependent Claims (23, 24)
Specification