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Height-adjustable artificial vertebral body

  • US 5,989,290 A
  • Filed: 11/24/1997
  • Issued: 11/23/1999
  • Est. Priority Date: 05/24/1995
  • Status: Expired due to Term
First Claim
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1. An adjustable substitute vertebra comprising:

  • a sleeve-shaped central member having a first end, a second end, a left-handed thread provided on said central member adjacent said first end and a right-handed thread provided on said central member adjacent said second end,a cylindrical first member having a wall, a plurality of apertures provided in said wall, a thread for screwing said first member onto said left-handed thread on said central member at one side thereof, the other side of said first member forming a free end which comprises a plurality of teeth,a cylindrical second member having a wall, a plurality of apertures provided in said wall, a thread for screwing said second member onto said right-handed thread on said central member at one side thereof, the other side of said second member forming a free end which comprises a plurality of teeth,said first and second member being made from titanium sheet material or titanium tube material,said cylindrical first member further comprising a plurality of V-shaped apertures at its free end to define said plurality of teeth, andsaid cylindrical second member further comprising a plurality of V-shaped apertures at its free end to define said plurality of teeth.

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