Artificial intervertebral joint permitting translational and rotational motion
First Claim
1. An intervertebral joint prosthesis, comprising:
- a ball component for engagement with a first vertebra, said ball component including a generally convex surface, and a flange at one end of said ball component for engaging the first vertebra; and
a trough component for engagement with a second vertebra adjacent to the first vertebra, said trough component including a generally concave surface with a substantially flat portion, and a flange at one end of said trough component for engaging the second vertebra;
wherein said generally convex surface and said generally concave surface are engaged together when said ball component and said trough component are engaged to the first vertebra and the second vertebra, respectively, and the engagement of said generally convex surface and said generally concave surface permits rotation of said ball component and said trough component with respect to each other, and the engagement of said generally convex surface and said substantially flat portion of said generally concave surface permits translation of said ball component and said trough component with respect to each other.
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Accused Products
Abstract
An intervertebral joint prosthesis having a ball component (22) for engagement with a first vertebra (26) and a trough component (24) for engagement with a second vertebra (27) adjacent to the first vertebra is disclosed. The trough component (24) includes a generally concave surface (50) having a substantially flat portion (52). When the ball component (22) and the trough component (24) are engaged to their respective vertebrae, the ball component (72) and the trough component (24) engage each other, permitting rotation and translation of the vertebrae with respect to each other. Both components include a flange (34,56) for engaging a vertebra. The invention also contemplates a method for and a tool for use in implanting a two-piece intervertebral joint prosthesis.
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Citations
30 Claims
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1. An intervertebral joint prosthesis, comprising:
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a ball component for engagement with a first vertebra, said ball component including a generally convex surface, and a flange at one end of said ball component for engaging the first vertebra; and a trough component for engagement with a second vertebra adjacent to the first vertebra, said trough component including a generally concave surface with a substantially flat portion, and a flange at one end of said trough component for engaging the second vertebra; wherein said generally convex surface and said generally concave surface are engaged together when said ball component and said trough component are engaged to the first vertebra and the second vertebra, respectively, and the engagement of said generally convex surface and said generally concave surface permits rotation of said ball component and said trough component with respect to each other, and the engagement of said generally convex surface and said substantially flat portion of said generally concave surface permits translation of said ball component and said trough component with respect to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An intervertebral joint prosthesis, comprising:
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a ball component for engagement with a first vertebra, said ball component including a generally convex surface, and a flange at one end of said ball component for engaging the first vertebra; and a trough component for engagement with a second vertebra adjacent to the first vertebra, said trough component including a generally concave surface with a substantially flat portion, and a flange at one end of said trough component for engaging the second vertebra, said concave surface being adapted to engage said convex surface. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification