APPARATUS AND METHODS FOR INSERTING FACET SCREWS
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United States of America Patent
Stats
-
N/A
Issued Date -
Nov 5, 2009
app pub date -
Apr 30, 2008
filing date -
Apr 30, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An apparatus includes a bone screw, a nut, and a washer. The bone screw has a first threaded portion, a second threaded portion, and a recessed portion disposed between the first threaded portion and the second threaded portion. The first threaded portion is configured to be threaded into a bone tissue. The nut is threadedly coupled to the second threaded portion of the bone screw. The nut having a tool engagement portion and a seating portion. The washer is disposed about the bone screw such that a first surface of the washer is disposed about the seating portion of the nut and a retention portion is disposed within the recessed portion of the bone screw. The washer is configured to rotate about an axis substantially normal to a longitudinal axis of the bone screw.
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