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Artificial spinal prosthesis

  • US 5,123,926 A
  • Filed: 02/22/1991
  • Issued: 06/23/1992
  • Est. Priority Date: 02/22/1991
  • Status: Expired due to Term
First Claim
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1. An artificial intervertebral disk implant for disposition in the space between two vertebrae after removal of a disk therefrom comprising:

  • (a) a sheath forming a fluid tight bag having a tapered and substantially oval shape, the tapered surfaces of the oval defining superior and inferior surfaces of the bag, said bag being comprised of a soft, pliable biologically compatible material having a plurality of spiked means formed in the superior and inferior surfaces for stably engaging said implant to the surfaces of the adjacent vertebrae for compressing into a tight bundle for insertion of the implant into the space between two vertebrae,(b) said sheath containing a plurality of multisized spring means positioned between the superior and inferior portions of said sheath and adapted to yieldably urge said surfaces away from each other whereby the shape of the implant after insertion into the space between two vertebrae and expansion conforms to the shape of the space between two vertebrae, and(c) said sheath having a port for receiving injection of fluid therethrough for expanding said bag to form said implant.

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