Patent ID: 6056753
Filing Date: 2000-05-02
Classification: A61B

Abstract:
A set screw adapted to be inserted in a threaded bore of a first implant and to set against a second implant for use in a osteosynthesis apparatus comprising:a) a head shaped for engagement by a torque inducing tool;b) a lower portion having a thread extending around an outer surface thereof and having a minor diameter at a base of said thread; said thread being sized and shaped to be threadably received in the first implant;c) a shank extending between said head and said lower threaded portion and having an outer diameter substantially equal to said minor diameter of said lower portion and said head having a diameter greater than said outer diameter of said shank;d) a bore extending into said set screw from an upper surface thereof; said bore having a first bore section and a second bore section; said second bore section having a reduced diameter relative to said first bore section and separated from said first bore section by a first internal shoulder; said first internal shoulder extending into said bore below an upper end of said thread; said first bore section is sized relative to said shank to result in shearing of said head from said lower portion upon application of a pre-selected torque on said head relative to said lower portion.