Pohl, Gerhard,Sommerich, Robert E.,Meer, Martin,Presbrey, Glen A.
申请号：
AU2008338495
公开号：
AU2008338495B2
申请日:
2008.12.16
申请国别(地区):
AU
年份:
2013
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.
