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US 7,156,876 B2Granted
Intervertebral motion disc having articulation and shock absorption
AssigneeDepuy Acromed, Inc.
InventorsMissoum Moumene, John Riley Hawkins
Life of this patent
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Abstract
A motion disc having an intermediate portion including a central articulating core component adapted to maintain the proper intervertebral spacing and a peripheral shock-absorbing component.
Claims14
A motion disc comprising:
- a) a first prosthetic vertebral endplate comprising:
- i) an first outer surface having a porous coating thereon and adapted to mate with a first vertebral body,
- ii) an first inner surface comprising an first peripheral surface and a first articulation surface,
- iii) a body portion connecting the first inner and outer surfaces,
- b) a second prosthetic vertebral endplate comprising:
- i) an second outer surface having a porous coating thereon and adapted to mate with a second vertebral body, and
- ii) an second inner surface comprising a second peripheral surface and a second articulation surface,
- iii) a body portion connecting the second inner and outer surfaces,
- c) an articulating core member adapted to maintain intervertebral spacing and comprising:
- i) a first articulation surface adapted for articulation with the first articulation surface of the first endplate, and
- ii) a second articulation surface adapted for articulation with the first articulation surface of the second endplate,
- wherein the articulating core member is disposed between the prosthetic endplates and oriented to produce a first articulation interface between the first articulation surface of the first endplate and the first articulation surface of the core member, and a second articulation interface between the first articulation surface of the second endplate and the second articulation surface of the core member, and
- d) a peripheral shock-absorbing component comprising:
- i) a first surface contacting the first peripheral surface of the first endplate, and
- ii) a second surface contacting the second peripheral surface of the second endplate,
- wherein the core component is selected from the group consisting of polyethylene, PEEK, ceramic and metals, and
- wherein the shock-absorbing component comprises an elastomer, and
- wherein each peripheral surface of the shock-absorbing component is tenaciously attached to the respective inner surface of each endplate.
15 more elements
Dependencies are inferred from the claim text.