Patent ID: 9055986
Filing Date: 2015-06-16
Classification: A61B,F16B

Abstract:
1. An orthopedic fastener comprising: a head; a shank, the shank extending from the head to a distal tip, the shank having a leading end portion adjacent the distal tip and a trailing end portion adjacent the head and an intermediate transition positioned between the leading and trailing end portions, at the intermediate transition the shank increasing in diameter to a larger diameter; and wherein the leading end portion has a first thread extending adjacent the distal tip through to at least the intermediate transition, and the trailing end portion has a second thread extending toward the head from the intermediate transition, the second thread of the trailing end portion being larger in outer diameter than the first threads in the leading end portion, the intermediate transition having one or more cutting grooves extending from at least a first thread in the intermediate transition through at least one of said second threads to initiate tapping of the second threads into cortical bone, and wherein the one or more cutting grooves in combination with the threads form threads in the bone to hold the fastener, the first thread has a pitch equal that of the second thread and the first thread extends between the distal end to the head, the first thread increasing in outer diameter at the intermediate transition.