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Low wear artificial spinal disc

  • US 5,676,701 A
  • Filed: 06/07/1995
  • Issued: 10/14/1997
  • Est. Priority Date: 01/14/1993
  • Status: Expired due to Term
First Claim
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1. An artificial spinal disc for surgical placement between first and second adjacent vertebrae of a patient'"'"'s spine, comprising:

  • (a) a first component for attaching to the first vertebrae, said first component including a concave recess, the concave recess having a contoured surface with a circumference of 360°

    ;

    (b) a second component for attaching to the second vertebrae, said second component including a projection that fits the concave recess of the first component, said projection having a convex contoured surface with a circumference of 360°

    ;

    (c) the corresponding contoured surfaces being configured so as to allow an unrestricted rotational and a flexion/extension bending motion between the first and second components relative to a patient'"'"'s normal spinal axis when in a standing position with the spine in a straightened position, said corresponding contoured surfaces allowing for a flexion/extension angle of about between 20°

    to 30°

    .

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