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PIVOTAL BONE ANCHOR ASSEMBLY WITH FORCED DOWNWARD DISPLACEMENT OF A COMPRESSION INSERT BY A TOOL
专利权人:
Roger P. Jackson
发明人:
Roger P. Jackson,James L. Surber
申请号:
US16363195
公开号:
US20190216511A1
申请日:
2019.03.25
申请国别(地区):
US
年份:
2019
代理人:
摘要:
A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A down-loadable compression insert, a down-loadable friction fit split retaining ring having inner and outer tangs and an up-loadable shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled.
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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