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US 5,133,761 AGranted
Finger joint prosthesis
AssigneeResearch Development Foundation
InventorThomas A. Krouskop
Life of this patent
Estimating the term…
Abstract
An implantable carbon composite finger joint prosthesis having first and second members rotatably attached forming a single axis joint. The joint has a core which includes a three directionally woven high density carbon-carbon composite for strength, and a base for supporting stems which includes a porous vitreous carbon to promote bony tissue ingrowth, and the coacting joint surfaces include carbide which is wear resistant and will not support fibrous tissue.
Claims5
An implantable carbon composite finger joint prosthesis comprising,
- a first member and a second member rotatably attached forming a single axis joint,
- said first member including a stem means for connecting said first member to a bore in a bone,
- said first member including a cylindrical surface forming a female receptacle having first open and second closed ends and having an axial extending bore therethrough, said surface including an opening parallel to the axis extending from the first open end of the receptacle to adjacent but spaced from the second closed end of the receptacle thereby forming a stop adjacent the second closed end, said opening defining a constant angular extent,
- said second member including a stem means for connecting said second member to a bore in a bone, and
- said second member including a cylindrical male member longitudinally movable through the first end of the female receptacle and rotatively movable in the axial bore of the female receptacle.
2 more elements
An implantable carbon composite finger joint comprising,
- a first member and a second member rotatably attached forming a single axis joint,
- said first member including a stem means for connecting said first member to a bore in a bone,
- said first member including a cylindrical surface forming a receptacle having first open and second closed ends and having an axial extending bore therethrough, said first end being open to the bore and said second end being closed forming a stop, said receptacle including an opening parallel to the axis extending from the open first end to the stop at the second end, said opening a constant angular extent of approximately 72.degree.,
- said second member including a stem means for connecting said second member to a bore in a bone, and
- said second member including a cylindrical male member longitudinally movable through the first end of the female receptacle and rotatively movable in the axial bore of the female receptacle,
- the axial axis of the stem of the first stem of the first member is offset from the axial axis of the bore of the bore of the receptacle, and
- said stems include surfaces which include porous vitreous carbon.
4 more elements
Dependencies are inferred from the claim text.