RETROGRADED HAMMERTOE COMPRESSION SCREW IMPLANT AND METHODS OF IMPLANTING THE SAME

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United States of America Patent

APP PUB NO 20160287300A1
SERIAL NO

14418771

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method and device to correct hammertoes. The device is a bone implant that includes an elongated body having a first threaded portion with a first thread pitch and a second threaded portion with a second thread pitch. When the implant is implanted into a joint and rotated about its longitudinal axis when mated with a driver bit, a target joint may be compressed using the pitch differential between the first and second threads. The first and second threads may also be disposed at opposing angles, to help prevent pistoning of the compressed bones. The implant can have one or two driving heads, to accommodate the different methods of insertion. The method involves surgically opening the PIP joint, driving a first portion of a bone implant in one direction into one of the proximal and middle phalanges, aligning the toe such that the second portion of the implant is aligned with the other of the proximal and middle phalanges, and driving the implant in the opposite direction, using a driver bit inserted through the tip of the toe and through an intramedullary canal in the distal and middle phalanges, such that the second portion is driven into the other of the proximal and middle phalanges.

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Patent Owner(s)

Patent OwnerAddress
WRIGHT MEDICAL TECHNOLOGY INC1023 CHERRY ROAD MEMPHIS TN 38117

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
CUMMINGS, Shannon Hernando, US 6 97
HARNESS, David Eads, US 9 131
MCCORMICK, Daniel F Memphis, US 40 676

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