Patent ID: 6949100
Filing Date: 2005-09-27
Classification: A61B,F16B

Abstract:
1. A bone screw for use in orthopaedic surgery with external fixture fixation devices comprising a head at one end, a single threaded portion at an opposite end, a non-threaded cylindrical shank between said head and threaded portion, said head having a non-threaded configuration for securement by an orthopaedic external fixation device, said threaded portion having an outside diameter and a core diameter which taper uniformly toward a tip at an end opposite from the head, said threaded portion having at least one constant pitch section, said threaded portion having threads formed with an acute angle generally triangular cross-sectional profile, said threads being separated from each other by a shaped bottom land having a concave profile defined by two countersloping planes, said threads having a constant height with the ratio of the outside diameter to said core diameter within a range of 1.43 to 1.60, and said threaded portion and head having diameters no greater than the diameter of said shank.