Enhanced variable angle bone bolt

Details Enhanced variable angle bone bolt Enhanced variable angle bone bolt

1995-03-27

1996-10-29

Buiz, Michael Powell

Surgery

Instruments

Orthopedic instrumentation

606 60, 606 72, 606 73, A61B 1756

Patent

active

055692478

ABSTRACT:
An improvement to a multi-angle fastener for use in connecting a bone portion with a connecting member. The multi-angle fastener includes a rotating member having a central longitudinal axis and an outer surface; a fixed member having a central longitudinal axis and an outer surface having threading configured to be surgically implantable into a patient's bone tissue; and a joint for connecting the rotating and fixed members together. The joint including corresponding mating surfaces configured to articulate with each other sufficiently to allow the rotating and fixed members to angle relative to one another. The improved mating surfaces comprising a tapered flange and a corresponding tapered groove respectively configured to allow for increased fatigue resistance of the fastener when the rotating and fixed members are secured together.

REFERENCES:
patent: 1077046 (1913-10-01), Dodds
patent: 5129899 (1992-07-01), Small et al.
patent: 5176679 (1993-01-01), Lin
patent: 5196014 (1993-03-01), Lin
patent: 5330474 (1994-07-01), Lin
patent: 5443467 (1995-08-01), Biedermann et al.

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