Semi-constrained metacarpophalangeal prosthesis

Details Semi-constrained metacarpophalangeal prosthesis Semi-constrained metacarpophalangeal prosthesis

1980-08-25

1981-12-08

Frinks, Ronald L.

Surgery

Truss

Pad

128 92C, A61F 124

Patent

active

043040110

ABSTRACT:
A metacarpophalangeal joint prosthesis includes a proximal component and a distal component mounted for relative pivotal movement with each including a metal core mounted in a plastic capsule with the proximal metal core having a cup-like socket in which a plastic bearing cup is positioned to receive a spherical pivot ball on the distal metal core member. A guide slot extends through the plastic bearing cup and the cup-like socket to guide the distal metal core member when said distal core member is in a pivoted flexion position with respect to the proximal core member to prevent lateral pivotal movement of the distal component under such conditions while permitting such movement when the components are in linear extended relation in the manner of the natural joint.

REFERENCES:
patent: 3506982 (1970-04-01), Steffee
patent: 3760427 (1973-09-01), Schultz
patent: 3805302 (1974-04-01), Mathys
patent: 3893196 (1975-07-01), Hochman
patent: 3938198 (1976-02-01), Kahn et al.
patent: 3939496 (1976-02-01), Ling et al.
patent: 4059854 (1977-11-01), Laure
patent: 4106128 (1978-08-01), Greenwald et al.
patent: 4158893 (1979-06-01), Swanson
patent: 4172296 (1979-10-01), D'Errico

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