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Dip fusion spike screw

  • US 10,245,091 B2
  • Filed: 12/30/2015
  • Issued: 04/02/2019
  • Est. Priority Date: 12/30/2015
  • Status: Active Grant
First Claim
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1. A bone fusion screw comprising:

  • (a) a first threaded portion having a uniform first diameter, first threads having a first thread pitch and a uniform first thread height, and a driver head; and

    (b) a second threaded portion with second threads having a second thread pitch and a second thread height, wherein the second threaded portion tapers from a second diameter to a smaller, third, diameter, wherein the second thread pitch is greater than the first thread pitch and the second thread height is greater than the first thread height; and

    (c) a central portion between the first threaded portion and the second threaded portion, wherein the central portion has a uniform diameter.

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