Adjustable intervertebral implant
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United States of America Patent
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Mar 31, 2015
Grant Date -
Apr 15, 2010
app pub date -
Mar 13, 2008
filing date -
Mar 13, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An expandable intervertebral implant (10) includes a first member (20), a second member (40), and a collar operatively associated with the first and second members, wherein the collar includes a threaded mechanism so that rotation of the collar causes the second member to axially move with respect to the first member. The implant includes a ratchet mechanism (50, 80) so that when at least a predetermined amount of force is applied, the second member moves with respect to the first member in an axial, ratchet-type manner. The collar preferably includes a drive ring (60) rotatably attached to the first member and a ratchet ring (80) operatively associated with the drive ring. The ratchet ring includes an inner bore having at least one corresponding ratchet thread tooth form formed thereon for engaging a ratchet thread tooth form formed on the second member.
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