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Hybrid bone fixation element and methods of using the same

  • US 8,556,949 B2
  • Filed: 11/13/2008
  • Issued: 10/15/2013
  • Est. Priority Date: 11/14/2007
  • Status: Active Grant
First Claim
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1. A hybrid bone fixation element for engaging a patient'"'"'s bone including a cortical outer portion surrounding an inner cancellous portion;

  • the hybrid bone fixation element comprising;

    a threaded proximal cortical bone contacting portion for threadably engaging the cortical outer portion of a patient'"'"'s bone, the threaded proximal cortical bone contacting portion having a cannulated bore formed therein; and

    a non-threaded expandable distal cancellous bone contacting portion for engaging the inner cancellous portion, the non-threaded expandable distal cancellous bone contacting portion including a plurality of closed periphery holes;

    wherein the threaded proximal cortical bone contacting portion comprises an externally threaded shaft having a radial diameter, the threaded shaft coupled to the non-threaded expandable distal cancellous bone contacting portion along a longitudinal axis, the non-threaded expandable distal cancellous bone contacting portion has a first unexpanded radial diameter in a first unexpanded state substantially equal to or less than the radial diameter of the externally threaded shaft, and the non-threaded expandable distal cancellous bone contacting portion has a second expanded radial diameter in a second expanded state at least twice the radial diameter of the externally threaded shaft; and

    an elongated head portion integral with the externally threaded shaft along the longitudinal axis, the head portion comprising a drive surface.

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