Polyaxial orthopedic fastening apparatus with independent locking modes
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United States of America Patent
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Apr 25, 2017
Issued Date -
N/A
app pub date -
Nov 24, 2014
filing date -
Feb 22, 2005
priority date (Note) -
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Abstract
An apparatus is designed to attach an implant to bone in a manner that permits rotational adjustment of the implant about multiple axes prior to securement via the apparatus. The apparatus includes separate rotational and translational fasteners that can be individually locked to independently restrict rotation and translation of the implant relative to the bone. The rotational fastener includes an interpositional member, an expandable engagement member, and a rotational locking member that urges the expandable engagement member to advance along the interpositional member. The resulting expansion of the engagement member causes it to engage the implant. The rotational fastener is slidable along a fixation member implanted in the bone until the translational fastener is applied to restrict relative translation between the rotational fastener and the bone.
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