Mani, Deepa,Lewis, Derek S.,Kay, David B.,Martin, Amanda
申请号：
AU2009292685
公开号：
AU2009292685B2
申请日:
2009.09.14
申请国别(地区):
AU
年份:
2013
代理人:
摘要：
A cannulated compression screw has a threaded distal end with a tip that includes one or more flutes to allow the screw to be self- tapping Optionally, the screw also includes one to four reverse cutting flutes proximal to the insertion tip. The distal threads are cancellous threads having a minor diameter and a major diameter and a constant thread pitch. An intermediate portion of the screw is non-threaded and the proximal end includes a compression wedge or taper that has one to five flutes that terminate before the top of the screw.The proximal end further includes a radiused bevel to the terminal surface that includes a hexagonal torque driving recess. The diameter of the non-threaded shaft section is constant distal from the compression wedge to the distal tip where it defines the minor diameter of the threaded portion. The screw optionally includes a tapered insertion tip.
