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Interbody spinal fusion implants

  • US 6,123,705 A
  • Filed: 10/01/1996
  • Issued: 09/26/2000
  • Est. Priority Date: 06/13/1988
  • Status: Expired due to Term
First Claim
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1. A spinal fusion implant made of a material appropriate for human implantation between two adjacent vertebrae, said implant comprising:

  • a non-threaded cylindrical member having an exterior with opposed arcuate portions adapted to be oriented toward the adjacent endplates of the two adjacent vertebrae, each of said opposed arcuate portions having at least one opening passing therethrough to allow bone growth from one of the adjacent vertebrae through said implant to the other of the adjacent vertebrae, said implant having a plurality of surface roughenings protruding from said exterior of said cylindrical member for engaging the two adjacent vertebrae to maintain said implant in place, said surface roughenings configured to resist expulsion of said implant from between the two adjacent vertebrae.

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