Dual-radius glenoid prosthetic component for total shoulder...

Details Dual-radius glenoid prosthetic component for total shoulder... Dual-radius glenoid prosthetic component for total shoulder...

2005-04-05

2005-04-05

Robert, Eduardo C. (Department: 3732)

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

Implantable prosthesis

Bone

Reexamination Certificate

active

06875234

ABSTRACT:
A dual-radius glenoid component of a shoulder joint prosthesis for use in total shoulder arthroplasty has two radii of curvature. At substantially the center of the articulating surface a first non-conforming radius of curvature is provided, while a second conforming radius of curvature, smaller than that of the first radius of curvature and more closely conforming to the curvature of the humeral component, is disposed about the periphery of the articulating surface. The central non-conforming radius of curvature provides reduced constraint of the humeral component. In contrast, the conforming peripheral radius of curvature provides maximum constraint of the humeral component. When the humeral component is substantially centered on the articulating surface reduced constraint is placed on the prosthesis and less load is transferred to the bone-implant interface. As the humeral component translates towards the periphery, constraint on the prosthesis increases to prevent dislocation.

REFERENCES:
patent: 5723018 (1998-03-01), Cyprien et al.
patent: 5928285 (1999-07-01), Bigliani et al.

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