Bone screw

Details Bone screw Bone screw

1978-02-22

1979-11-27

Frinks, Ronald L.

Surgery

Truss

Perineal

128 84R, 85 42, 85 47, A61F 504, A61B 1718

Patent

active

041755553

ABSTRACT:
A bone screw is provided with screw threads which are like-handed but of different pitch on its respective leading and trailing ends. In the more favored embodiment, the pitch of the leading screw thread exceeds that of the trailing screw thread. Such a screw may be used to hold portions of a fractured bone in compressive engagement.

REFERENCES:
patent: 146023 (1873-12-01), Russell
patent: 2801631 (1957-08-01), Charnley
"Illustrations for the Introduction of the Lorenzo Lag Screw" DePuy Fracture Appliances & their Application (catalog), DePuy Mfg. Co., Warsaw, Ind. pp. 46-48.

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