Bone fixation plate
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United States of America Patent
Stats
-
Jan 27, 2009
Grant Date -
Oct 21, 2004
app pub date -
Apr 21, 2003
filing date -
Apr 21, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A bone plate for use in anterior lumbar spinal fixation has interlocking components to prevent dislodgement of the plate due to anatomical forces. The exposed surface of the plate is smooth to prevent trauma to internal body tissue. The plate spans the intervertebral space with each end attached to an adjacent vertebrae by locking screws threadably engaged with tubular bone anchors. The bone anchors are threaded into the vertebrae and have a reduced diameter leading end which the locking screws expand to lock the anchor in the vertebrae and secure the end of the locking screw in the anchor. The plate has a countersunk cavity including portions overlapping the locking screws. A locking cap fits in the cavity to secure the other end of the locking screws from backing-out of the plate.
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