Patent ID: 8268005
Filing Date: 2012-09-18
Classification: A61F

Abstract:
1. A patellar implant comprising: a posterior portion having a first radial sidewall extending between an outboard face and an inboard face, said outboard face including an articulating surface, said inboard face including one of a stem and a recess, and one of an annular central hub and an annular radial pocket said posterior portion further defining a pair of blind bores that extend from said articulating surface toward said inboard face and are separated by a bridge that is recessed into said posterior portion from said outboard face; an anterior portion having a second radial sidewall extending between a tissue engaging surface and a posterior portion engaging surface, said anterior portion being formed of porous metal and having the other of said stem and said recess wherein said stem and said recess attain a mechanical interlock in an assembled position upon advancement of said stem into said recess, said anterior portion further having the other of said annular central hub and said annular radial pocket, wherein complementary engaging surfaces formed on said annular central hub and said annular radial pocket, respectively, surround said stem and said recess and engage each other when said annular radial pocket receives said annular central hub in said assembled position, said anterior portion having passages formed from said second radial sidewall to said tissue engaging surface, said passages adapted to pass suture therethrough; and wherein said mechanical interlock between said stem and recess, as well as engagement of said complementary engaging surfaces of said annular central hub and said annular radial pocket cooperate to resist separation of said posterior and anterior portions.