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PIVOTAL BONE ANCHOR ASSEMBLY WITH SNAP-IN-PLACE BUSHING FOR PRE-LOCK FRICTION FIT
专利权人:
Alphatec Spine; Inc.
发明人:
Thomas Purcell,Don Hair,Tamas T. Frech
申请号:
US16374500
公开号:
US20190223921A1
申请日:
2019.04.03
申请国别(地区):
US
年份:
2019
代理人:
摘要:
A spinal screw assembly providing an adjustable securement of a fixation rod across at least two vertebrae. The assembly includes a pedicle screw having a spherical head portion, a threaded shaft portion and a tool engagement surface in the head portion for use in driving the screw into a vertebrae. The head portion of the screw is positioned in a body member adjacent a curvilinear surface disposed about an aperture in the end of the body member such that the shaft portion of the screw extends therethrough and the curvilinear inner surface abuts and mates with the head portion of the screw so as to define a ball joint therewith. The body member additionally defines a pair of opposed parallel slots therein adapted to receive a portion of the fixation rod and a locking cap bears against the fixation rod to releasably secure the rod within the assembly.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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