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Spinal stabilization implant system

  • US 5,397,363 A
  • Filed: 08/11/1992
  • Issued: 03/14/1995
  • Est. Priority Date: 08/11/1992
  • Status: Expired due to Term
First Claim
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1. A surgical implant system for the stabilization of a human spine by fixation of vertebra, said system comprising:

  • a first screw formed from a shank having a first end and a second end, said first end having a relatively coarse self-tapping thread over a predetermined length of said first end, said second end having at least two spaced apart protruding members extending obliquely therefrom, said protruding members defining an inner surface saddle shaped and configured for receipt of at least one rod therein, said surface saddle having at least one outer threaded surface;

    means for connecting said first screw to a second screw and being directly engaged to said first screw and said second screw, said second screw having a first end and a second end, said first end having a relatively coarse self-tapping thread over a predetermined length of said first end, said second end having at least two spaced apart protruding members extending obliquely therefrom, said protruding members defining an inner surface saddle shaped and configured for receipt of at least one rod therein, said surface saddle having at least one outer threaded surface;

    at least one nut having an internal thread engageable with said threads formed on said outer surface of said protruding member for rigidly coupling said means for connecting to either said first screw or said second screw;

    wherein said first screw and said second screw are each configured and adapted to be inserted into bone structure of a human spinal column whereby placing a rod within the saddle of a first screw and the saddle of a second screw allows for the stabilization of a human spine in a fixed position upon securing said rod in said saddles upon attachment of said nut.

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