Gerhard Franz Pohl;Glen Arthur Presbrey;Robert Sommerich;Martin Meer
发明人:
Robert Sommerich,Glen Arthur Presbrey,Martin Meer,Gerhard Franz Pohl
申请号：
US13546560
公开号：
US20120277878A1
申请日:
2012.07.11
申请国别(地区):
US
年份:
2012
代理人:
摘要：
An intervertebral expandable spacer having a pair of co-axial annuluses locked together by an engagement member having i) a set screw and ii) a pressure plate having an outer face contacting the set screw and an inner face having teeth adapted to mate with the ratchet notches of the second member.
