Kevin E. Varner,Keith A. Heier,Travis W. Hanson,Casey M. Chambers,Rebecca Hawkins Wahl
申请号：
US15612520
公开号：
US10349992B2
申请日:
2017.06.02
申请国别(地区):
US
年份:
2019
代理人:
摘要：
A differential compression bone screw and a method are provided for compressing adjacent bone portions together to encourage bone fusion. The compression bone screw is comprised of a head portion and a shank. A center hole extends from the head portion to a distal end of the shank. A superior end of the head portion includes a shaped opening that receives a tool for driving the compression bone screw into a hole drilled in a patient's bone. An inferior end of the head portion includes barbs that engage with surrounding bone tissue. A smooth portion of the shank is disposed between proximal threads and distal threads that rotatably engage within the hole in the patient's bone. A thread pitch of the distal threads is greater than a thread pitch of the proximal threads, such that the compression bone screw comprises a differential pitch configured to compress the adjacent bone portions.
