Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rod
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United States of America Patent
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Sep 4, 2012
Grant Date -
Oct 6, 2011
app pub date -
Dec 2, 2010
filing date -
Dec 2, 2009
priority date (Note) -
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Abstract
A bone anchor comprising a self-centering ball-joint suitable for use in a spine stabilization prosthesis which supports the spine while providing for the preservation of spinal motion. The bone anchor has a deflectable ball-rod partially received in a socket of a housing formed in the head of the bone anchor. A centering rod received partially in the ball-rod and partially within the housing operates to align the ball-rod with the longitudinal axis of the bone anchor. Deflection of the ball-rod bends the centering rod which in turn applies a restoring force upon the ball-rod.
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