Intramedullary compression screw system

摘要

An intramedullary compression screw device and method including a cannulated compression screw and a cannulated proximal module for enabling the joining and alignment of two or more phalanges at the proper compression to facilitate healing in a patient. The cannulated compression screw includes a smooth body portion, an external threaded portion, and a low profile head. The cannulated proximal module includes external self-cutting threads and internal threads complementary with the external threads of the cannulated compression screw. Means are provided for driving the proximal module into a proximal phalanx and for securing the compression screw into the proximal module. A proximal module sizing template provides a means for determining the proper diameter of proximal module for insertion in the proximal phalanx. A depth gauge is provides a means for determining the proper length of cannulated compression screw for attachment to the proximal module.

主权项

1. An intramedullary compression screw system for aligning and compressing the phalanges of the lesser digits in the foot or hand for healing, comprising:
a cannulated compression screw including an unthreaded proximal end and an externally threaded distal end; a cannulated proximal module including a body having an open bore, internal threads and self-cutting external threads; a low profile hex head on said compression screw; a multi-edge cutting element on said self-cutting external threads; a proximal end and a distal end on said proximal module; said multi-edge cutting element including a plurality of thread-cutting elements on said distal end of said proximal module; said thread-cutting elements on said proximal module including a primary thread-cutting element, a secondary thread-cutting element, and a tertiary thread-cutting element; and an outer cutting edge and an inner cutting edge on said primary thread-cutting element of said proximal module, said inner cutting edge extending from said open bore of said proximal module partially through said proximal module body, said outer cutting edge extending from the outer surface partially through said proximal module body.