Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1986-03-28
1988-02-16
Apley, Richard J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
A61F 242
Patent
active
047252804
ABSTRACT:
A prosthetic joint for replacing a finger joint, including a shell-like member which is secured to the distal end of one phalanx, this shell-like joint having a vertical cross section which resembles a semicylindrical shell. The shell preferably has parallel legs extending rearwardly from the edges of the semicylindrical portion, with the lowermost leg having a greater rearward extension. The shell has a transverse cross section which results in two convex bearing surfaces symmetrically positioned relative to the central vertical plane of the shell. These convex bearing surfaces define a groove therebetween at the central vertical plane. The other joint member includes a tack portion which extends into the other phalanx, which tack portion has an enlarged head provided with a concave bearing surface for engagement with the exterior bearing surface on the shell. The concave bearing surface is provided by a pair of sidewardly positioned bearing parts which are symmetrical about an intermediate ridge which extends along the central vertical plane of the head. The bearing parts of the head have a surface configuration compatible with the bearing surfaces of the shell.
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Apley Richard J.
Isabella David J.
Laure Prosthetics, Inc.
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