Charles J. Winslow,Steven T. Mitchell,John J. Flynn,James F. Zucherman,Ken Y. Hsu,Henry A. Klyce,H. Adam R. Klyce
申请号：
US13223961
公开号：
US20120143258A1
申请日:
2011.09.01
申请国别(地区):
US
年份:
2012
代理人:
摘要：
A cannulated bone anchor comprising a self-centering ball-joint suitable for use in a spine stabilization prosthesis which supports the spine while providing for the preservation of spinal motion. The cannulated bone anchor has a deflectable post partially received in a socket of a housing formed in the head of the bone anchor. A centering rod received partially in the post and partially within the housing operates to align the post with the longitudinal axis of the bone anchor. Deflection of the post bends the centering rod which in turn applies a restoring force upon the post. The centering rod includes an inner-superelastic core and an outer polymer sheath.
