SYSTEMS AND METHODS FOR RETAINING A PLATE TO A SUBSTRATE WITH AN ASYNCHRONOUS THREAD FORM
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United States of America Patent
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app pub date -
Mar 2, 2009
filing date -
May 18, 2007
priority date (Note) -
Abandoned
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Abstract
The present disclosure provides systems and methods for retaining a plate, such as a cervical plate, to a substrate, such as bone, through a locking screw with upper asynchronous threads and lower cancellous threads. The present invention utilizes the locking screw with cancellous-type threads to draw the screw into the substrate. The screw is operable to retain a plate to the substrate and is configured to gall and lock to the plate through the upper threads which are out-of-phase with corresponding threads on the plate thereby preventing reverse threading or backing out of the screw.
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