Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1994-11-10
1996-06-04
Isabella, David
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 18, A61F 242
Patent
active
055229034
ABSTRACT:
A finger prosthesis includes a first screw to be received in an intramedullary canal of a phalange. The first screw includes a first head defining a first longitudinal bore therein. There is provided a second screw to be received in an intramedullary canal of another, adjoining phalange. The second screw includes a second head defining a second longitudinal bore therein. The prosthesis further has a first joint part having a convex semi-cylindrical surface, a transverse slot and a bore hole, a pivot pin held in the bore hole and traversing the transverse slot. The first piston is secured to the pivot pin for swinging motion in the transverse slot. The first piston is received in the first longitudinal bore for sliding motions therein. There is further provided a second joint part situated between the first head and the first joint part and having a concave semi-cylindrical surface slidingly contacting the convex semi-cylindrical surface of the first joint part. A second piston extends from the first joint part and is slidingly received in the second longitudinal bore. An arrangement prevents the first and second pistons from angular displacements relative to the respective first and second screws.
REFERENCES:
patent: 3869729 (1975-03-01), Attenborough
patent: 4106128 (1978-08-01), Greenwald et al.
patent: 4304011 (1981-12-01), Whelan, III
patent: 5147386 (1992-09-01), Carignan et al.
Bouchon Yves
Bour Christian
Dinville Herve
Sokolow Constantin
Isabella David
JBS S.A.
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