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US 4,059,102 AGranted
Bone securing devices
AssigneeNational Research Development Corporation
InventorMichael Bertrand Devas
Life of this patent
Estimating the term…
Abstract
A bone screw is provided having leading and trailing end portions with respective threads of opposite hands. The leading end portion will normally be narrower than the trailing end portion, and either or both portions can be tapered towards their leading ends.
Claims2
A new use for a screw of the type which has a leading end portion with a thread of one hand therearound and a trailing end portion with a thread of opposite hand therearound,
- said new use being to connect together two mutually nonrotatable component parts, each of which is one of a fragment of a fractured bone and a fracture fixation device for disposition against said bone and said new use comprising the method of:
- screwing one of said end portions of said screw into one of said component parts, and
- then screwing the other of said screw end portions into the other of said component parts while partially unscrewing said screw from said one component part to locate said screw through said bone and to effect compressive force on said bone between said component parts.
Dependencies are inferred from the claim text.