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Spinal facet implants with mating articulating bearing surface and methods of use

  • US 20050131538A1
  • Filed: 06/02/2004
  • Published: 06/16/2005
  • Est. Priority Date: 12/10/2003
  • Status: Active Grant
First Claim
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1. A facet prosthesis system for replacing an inferior facet of a first vertebra of a spine, and a superior facet of a second vertebra of the spine, the system comprising:

  • an inferior prosthesis shaped to be coupled to the first vertebra, the inferior prosthesis having an inferior articulating surface; and

    a superior prosthesis shaped to be coupled to the second vertebra, the superior prosthesis having a superior articulating surface;

    wherein the articulating surfaces of the inferior and superior prostheses are shaped and relatively positioned to articulate against each other such that a medial-lateral range of relative motion between the first and second vertebrae decreases significantly with extension of the spine.

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