Patent ID: 9017416
Filing Date: 2015-04-28
Classification: A61F,A61L,B29C,B29K,B29L,B32B,B33Y,C08J,C08K

Abstract:
1. A prosthesis comprising: a shell; and disposed on the shell, a polymer liner having a concave articular bearing surface opposite the shell, the polymer liner comprising (i) a first cross-linked polymer region and (ii) a second substantially non-cross-linked polymer region molded to the first cross-linked polymer region, wherein (i) exposed portions of the first cross-linked polymer region and the second substantially non-cross-linked polymer region collectively define the concave articular bearing surface, (ii) the exposed portion of the first cross-linked polymer defines a pre-determined wear zone of the concave articular bearing surface, (iii) the pre-determined wear zone does not extend along the entire concave articular bearing surface, (iv) the concave articular bearing surface of the polymer liner terminates at non-concave edges, wherein an exposed surface of a non-concave edge is defined only by an exposed surface of the second substantially non-cross-linked polymer, and (v) the second substantially non-cross-linked polymer region includes a rounded edge that extends over the edge of the shell.