Patent ID: 9655725
Date: 2017-05-23
CPC Classifications: A61F

Claim:
1. An articulating total joint prosthesis comprising a convex (ball-type) member that articulates with a concave (cup-type) member, wherein (a) the convex member has a first surface curvature, a portion of which defines a band of contact between the convex member and the concave member; and (b) the concave member is made of a first material, has a second surface curvature different from the first surface curvature, has an annular recess and, positioned within the annular recess, an annular insert made of a second material that is harder than the first material, wherein the annular insert is centered on, and resides between 20 to 50 degrees from, an axis that passes through the center of the convex member and the center of the band of contact on the convex member.