Patent ID: 8556949
Filing Date: 2013-10-15
Classification: A61B,A61F

Abstract:
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.