Semi-constrained wrist implant

Details Semi-constrained wrist implant Semi-constrained wrist implant

1988-12-22

1990-06-26

Cannon, Alan W.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

623 18, A61F 242

Patent

active

049368540

ABSTRACT:
A wrist implant for stabilizing the proximal carpal row and prevent ulnar migration thereof while permitting movement at the radiocarpal joint includes a body having a generally planar, proximal surface which has a teardrop shape. The body further defines a generally triangular or wedge-shaped dorsal surface which is joined to a curved medial surface. The body defines a smooth recess including a lunate surface. The recess is configured to receive the carpal row lunate bone and is open distally and palmarly. The implant further includes a proximal stem which extends perpendicular to the proximal surface. The implant is adapted to be positioned at the distal end of the radius with the stem inserted into the intramedullary canal of the radius bone. The implant constrains the proximal row of the carpal bones, stabilizing the joint and preventing ulnar migration of the wrist bones.

REFERENCES:
patent: 3879767 (1975-04-01), Stubstad
patent: 3987500 (1976-10-01), Schlein
patent: 4131957 (1979-01-01), Bokros
patent: 4645505 (1987-02-01), Swanson
patent: 4784661 (1988-11-01), Beckenbaugh et al.

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