Patent ID: 8690958
Filing Date: 2014-04-08
Classification: A61F

Abstract:
1. A humeral head resurfacing implant comprising an integral head and stem which implant comprises: an integral isotropic graphite substrate having a head portion and a distal stem portion, a coating of dense isotropic pyrocarbon having a thickness of at least about 0.2 mm that covers substantially said entire substrate, which pyrocarbon has a density of between about 1.7 and 2.1 gm/cm said head of said implant having an exterior surface shape of a section of a spheroid which serves as a proximal surface to interface with a patient's glenoid or glenoid replacement, said stem of said implant being of cruciform cross section with 4 fins and having a width (C) of between about 45% and 60% of a corresponding width (A) of said head, and each of said 4 fins of said cruciform cross section stem, which fins extend radially from a center axial region of an undersurface of said head, having a thickness equal to between about 2 mm and 3 mm and joining said undersurface of said head at a fillet having a radius of between about 1.5 mm and 2.2 mm.