Stackable cage system for corpectomy/vertebrectomy
First Claim
1. A prosthetic device to integrate with and support vertebrae in a vertebral column, comprising:
- a plurality of inert bodies conforming in shape and size with hard end plates of vertebrae on which the prosthetic device is to be seated,each of the bodies having ridged top and bottom faces adapted to selectively interdigitate with faces of adjacent bodies and to bite into adjoining vertebrae, the ridged top and bottom faces having anterior/posterior and medial/lateral ridges to provide stability in the medial/lateral and anterior/posterior directions respectively,each of the bodies also having side walls disposed between the ridged top and bottom faces to define an aperture which opens through the faces, and a plurality of threaded openings disposed within the side walls, said plurality of threaded openings positioned and designed to receive threaded components of additional spine stabilization devices.
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Accused Products
Abstract
Surgical prosthetic modular devices used singularly or stacked together are provided for use to replace excised vertebral tissue. The devices are rigid plugs, dimensionally similar to normal vertebral bodies, and have ridged faces to engage adjacent vertebral bodies or to interdigitate when stacked. Ridges extend in both the medial/lateral and anterior/posterior directions to prevent slipping in the anterior/posterior and medial/lateral directions respectively. A locking screw may be used to secure a stack to form a singular rigid prosthetic device. The devices are also provided with a plurality of threaded openings. In the method of this invention, a device is used to replace excised vertebral tissue, threaded bolts are inserted into the threaded openings, and other spine stabilization devices are attached to the bolts. In corporectomies, the device can be bolted to a plate, which in turn is fixed to adjacent vertebrae. In spondylectomies, the device can be fixed to a series of posteriorly placed rods.
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Citations
29 Claims
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1. A prosthetic device to integrate with and support vertebrae in a vertebral column, comprising:
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a plurality of inert bodies conforming in shape and size with hard end plates of vertebrae on which the prosthetic device is to be seated, each of the bodies having ridged top and bottom faces adapted to selectively interdigitate with faces of adjacent bodies and to bite into adjoining vertebrae, the ridged top and bottom faces having anterior/posterior and medial/lateral ridges to provide stability in the medial/lateral and anterior/posterior directions respectively, each of the bodies also having side walls disposed between the ridged top and bottom faces to define an aperture which opens through the faces, and a plurality of threaded openings disposed within the side walls, said plurality of threaded openings positioned and designed to receive threaded components of additional spine stabilization devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A prosthetic device for vertebral fusion, comprising:
- a plurality of inert bodies conforming in shape and size with hard end plates of vertebrae on which the prosthetic device is to be seated,
each of said bodies having ridged top and bottom faces adapted to selectively interdigitate with faces of adjacent bodies to form a stack and to bite into adjoining vertebrae, the ridged top and bottom faces having anterior/posterior and medial/lateral ridges to provide stability in the medial/lateral and anterior/posterior directions respectively, side walls disposed between the ridged top and bottom faces to define an aperture which opens through the faces, and a fastener opening extending from the top face to the bottom face and extending through each body generally in the same direction as the vertebral column but recessed from the top and bottom faces, the fastener opening positioned to receive a fastener therein, and the fastener is sized to secure the stack of bodies without protruding from the stack. - View Dependent Claims (10, 23)
- a plurality of inert bodies conforming in shape and size with hard end plates of vertebrae on which the prosthetic device is to be seated,
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11. A prosthetic device adapted for fusing together adjoining vertebrae, comprising:
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an inert body conforming in shape and size with hard end plates of vertebrae on which the prosthetic device is to be seated, the body having ridged top and bottom faces, side walls disposed between the ridged top and bottom faces, the side walls having a plurality of beveled corners defining a plurality of side faces at varying angles to each other and a plurality of threaded openings disposed within the side faces, said plurality of threaded openings positioned and designed to receive threaded components of an additional spine stabilization device. - View Dependent Claims (12, 13)
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14. A method of vertebral fusion comprising the steps of
providing a plurality of inert bodies shaped to fit opposed end faces of vertebrae in a vertebral column, each of the bodies having ridged top and bottom faces adapted to selectively interdigitate with faces of adjacent bodies to form a stack and to bite into adjoining vertebrae, the ridged top and bottom faces having anterior/posterior and medial/lateral ridges to provide stability in the medial/lateral and anterior/posterior directions respectively, each of the bodies also having side walls disposed between the ridged top and bottom faces to define an aperture which opens through the faces, and each of the bodies having a fastener opening extending through each body from the top face to the bottom face and extending generally in the same direction as the vertebral column, selecting the appropriate combination of bodies for fusion within the vertebral column, stacking the appropriate combination of bodies by allowing the ridged top and bottom faces of adjacent bodies to interdigitate, providing a fastener, fastening the stacked bodies by extending the fastener through the fastener opening in each of the bodies to form a rigid prosthetic device, preparing the vertebral column to receive the rigid prosthetic device, and inserting the rigid prosthetic device into the vertebral column.
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19. A method of vertebral fusion comprising the steps of
providing a plurality of inert bodies shaped to fit opposed end faces of vertebrae in a vertebral column, each of the bodies having ridged top and bottom faces adapted to bite into adjoining vertebrae, the ridged top and bottom faces having anterior/posterior and medial/lateral ridges to provide stability in the medial/lateral and anterior/posterior directions respectively, each of the bodies also having side walls disposed between the ridged top and bottom faces to define an aperture which opens through the faces, and a plurality of openings disposed within the side walls, preparing a stack of at least one of the bodies, preparing the vertebral column to receive the stack, inserting the stack into the vertebral column, providing an additional spine stabilization device, and attaching the additional spine stabilization device to one of the openings disposed within the side walls.
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24. A prosthetic device to integrate with and support vertebrae in a vertebral column, comprising:
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a plurality of inert bodies conforming in shape and size with hard end plates of vertebrae on which the prosthetic device is to be seated, each of the bodies having ridged top and bottom faces adapted to selectively interdigitate with faces of adjacent bodies and to bite into adjoining vertebrae, the ridged top and bottom faces having anterior/posterior and medial/lateral ridges to provide stability in the medial/lateral and anterior/posterior directions respectively, each of the top and bottom faces having recesses therein, and each of the bodies having a fastener opening extending generally in the same direction as the vertebral column from the recess in the top face to the recess in the bottom face, the fastener opening positioned to receive a locking screw to secure a stack of the bodies, the locking screw sized such that it does not protrude beyond the stack of bodies, each of the bodies also having side walls disposed between the ridged top and bottom faces to define an aperture which opens through the faces, and a plurality of threaded openings disposed within the side walls, said plurality of threaded openings positioned and designed to receive threaded components of additional spine stabilization devices. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification