Simon Gerhard Sjovold;Keun-Young Anthony Kim;Eric A. Lab;Joel P. Bales
发明人:
Eric A. Lab,Joel P. Bales,Simon Gerhard Sjovold,Keun-Young Anthony Kim
申请号：
US13180332
公开号：
US09084634B1
申请日:
2011.07.11
申请国别(地区):
US
年份:
2015
代理人:
摘要：
A spinal screw assembly is provided. The assembly may be provided with a screw and a movable head in which angulation of the screw relative to the movable head is constrained so that angulation within limits is allowed in one plane but lesser or no angulation is allowed in another plane. Methods to assemble the disclosed apparatus are also disclosed.
