Compression bone screw

Details Compression bone screw Compression bone screw

1981-09-11

1984-08-07

Rosenbaum, C. Fred

Surgery

Truss

Perineal

128 92BC, 128 92BB, A61F 504

Patent

active

044637535

ABSTRACT:
A compression screw having a proximal portion and a distal portion integrally interconnected by an intermediate tapering portion. The proximal and distal portions have threads of the same pitch. The intermediate portion has a smooth outer surface tapering the larger diameter proximal portion into the smaller diameter distal portion. The shaft of the proximal portion is cylindrical and the shaft of the distal portion is tapered, terminating in a sharp trocar point, and the threads of the proximal and distal portion may be provided with self-cutting flutes. The smooth tapering surface of the intermediate portion cooperates with the threads at the distal end to effect counteracting forces which cause compressions of the bone between the distal end and the taper.

REFERENCES:
patent: 2382019 (1945-08-01), Miller
patent: 2489870 (1949-11-01), Dzus
patent: 2494229 (1950-01-01), Collison
patent: 3915162 (1975-10-01), Miller
patent: 4059102 (1977-11-01), Devas
patent: 4175555 (1979-11-01), Herbert

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