Prosthetic Intervertebral Disc Implants
First Claim
1. A prosthetic intervertebral disc, comprising:
- an upper plate including a first piece coupled with a second piece, wherein a first plurality of slots are located in the first piece and the second piece is positioned above the first piece such that the first plurality of slots are covered by the second piece;
a lower plate including a third piece coupled with a fourth piece, wherein a second plurality of slots are located in the third piece and the fourth piece is positioned below the third piece such that the second plurality of slots are covered by the fourth piece;
a core member positioned between the upper and lower plates; and
a fibrous component extending through at least one of the first plurality of slots in the first piece of the upper plate and at least one of the second plurality of slots in the third piece of the lower plate such that the upper plate is held to the lower plate.
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Accused Products
Abstract
Prosthetic intervertebral discs and methods for using the same are described. The subject prosthetic discs include upper and lower endplates separated by a compressible core member. The prosthetic discs described herein include one-piece, two-piece, three-piece, and four-piece structures. The subject prosthetic discs exhibit stiffness in the vertical direction, torsional stiffness, bending stiffness in the sagittal plane, and bending stiffness in the front plane, where the degree of these features can be controlled independently by adjusting the components of the discs. The interface mechanism between the endplates and the core members of several embodiments of the described prosthetic discs enables a very easy surgical operation for implantation.
25 Citations
30 Claims
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1. A prosthetic intervertebral disc, comprising:
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an upper plate including a first piece coupled with a second piece, wherein a first plurality of slots are located in the first piece and the second piece is positioned above the first piece such that the first plurality of slots are covered by the second piece; a lower plate including a third piece coupled with a fourth piece, wherein a second plurality of slots are located in the third piece and the fourth piece is positioned below the third piece such that the second plurality of slots are covered by the fourth piece; a core member positioned between the upper and lower plates; and a fibrous component extending through at least one of the first plurality of slots in the first piece of the upper plate and at least one of the second plurality of slots in the third piece of the lower plate such that the upper plate is held to the lower plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A prosthetic intervertebral disc, comprising:
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an upper plate including an inner portion and an outer portion, wherein each of a first plurality of slots extend between an upper surface and a lower surface of the inner portion of the upper plate, and wherein the first plurality of slots are covered by the outer portion of the upper plate; a lower plate including an inner portion and an outer portion, wherein each of a second plurality of slots extend between an upper surface and a lower surface of the inner portion of the lower plate, and wherein the first plurality of slots are covered by the outer portion of the lower plate; a core member positioned between the upper and lower plates; and a fibrous component extending through at least one of the first plurality of slots in the inner portion of the upper plate and through at least one of the second plurality of slots in the inner portion of the lower plate such that the upper plate is held to the lower plate. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification