David D. Konieczynski,Thomas V. Doherty,Dale E. Whipple,Niall Casey,Mark T. Hall
申请号：
US14157081
公开号：
US09155579B2
申请日:
2014.01.16
申请国别(地区):
US
年份:
2015
代理人:
摘要：
The present invention generally provides a polyaxial fixation device having a shank with a spherical head formed on a proximal end thereof, and a receiver member having an axial passage formed therein that is adapted to polyaxially seat the spherical head of the shank. The polyaxial bone screw further includes an engagement member that is adapted to provide sufficient friction between the spherical head and the receiver member to enable the shank to be maintained in a desired angular orientation before locking the spherical head within the receiver member.
