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Prosthetic disc and method of implanting

  • US 4,772,287 A
  • Filed: 08/20/1987
  • Issued: 09/20/1988
  • Est. Priority Date: 08/20/1987
  • Status: Expired due to Term
First Claim
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1. An elongated cylindrical prosthetic intervertebral disc capsule adapted to be inserted in a sagittal direction within the nucleus of a damaged disc, said capsule having a diameter approximating the height of a human disc space and a length approximating the sagittal diameter of the nucleus of the disc, and said capsule comprising:

  • an outer layer of strong, inert fibers intermingled with a bioresorbable material which attracts tissue ingrowth, anda fluid-filled bladder, such that when two of these capsules are inserted side-by-side into the nucleus of the anulus of a damaged disc, each lying near one of the lateral edges of the disc and spaced from the other capsule, they will maintain both height and motion, including front-to-back bending, at the disc space, but will limit rotation.

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