Instrument and method for provisionally locking a polyaxial screw
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United States of America Patent
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Dec 19, 2017
Issued Date -
N/A
app pub date -
Oct 18, 2013
filing date -
Oct 19, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An instrument for provisionally tightening a screw body member to a head of a polyaxial bone screw includes a barrel body, an inner shaft, a handle and lever, and a load link assembly. The barrel body includes a distal end with a pair of rotatable tangs configured to engage the screw body member. The inner shaft includes a distal end configured to engage a bushing within the screw body member. The lever pivotally couples to one of the handle and the barrel body. The load link assembly couples to the inner shaft and the lever. Actuation of the lever towards causes the load link assembly to longitudinally displace the inner shaft toward the distal end to contact the bushing and advance the bushing into frictional fit between the screw body member and the head of the polyaxial bone screw.
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