Patent ID: 8182541

Claim:
A humeral prosthesis configured to be implanted in a human body having a humerus, an acromion, and a scapula that defines a glenoid surface, comprising: a head having: a first body having (i) a first exterior articulating surface configured to articulate with the glenoid surface, said first exterior articulating surface being partially spherically-shaped and defining a circular outer periphery that includes a first outer periphery portion and a second outer periphery portion, and (ii) a first interior support surface opposed to said first exterior articulating surface, said first interior support surface defining a first cavity; and a second body having (i) a second exterior articulating surface configured to articulate with the acromion, said second exterior articulating surface extending as a flange from said first outer periphery portion of said circular outer periphery of said first exterior articulating surface, said second exterior articulating surface being contiguous with said first exterior articulating surface, said second exterior articulating surface defining a second outer periphery, and (ii) a second interior support surface opposed to said second exterior articulating surface, said second interior support surface defining a second cavity that is contiguous with said first cavity; and a stem having (i) a proximal end portion extending from said first interior support surface and defining a proximal outer stem periphery, wherein all of said proximal outer stem periphery is located within said first cavity, and (ii) a distal end portion defining a distal outer stem periphery, wherein all of said distal outer stem periphery is spaced apart from said first cavity, wherein no portion of said second exterior articulating surface extends from said second outer periphery portion of said circular outer periphery of said first exterior articulating surface, wherein (i) said circular outer periphery of said first exterior articulating surface defines a first plane, (ii) said second outer periphery of said second exterior articulating surface defines a second plane, and (iii) said first plane and said second plane defines an obtuse angle therebetween, wherein a first bone space is defined between said proximal outer stem periphery and said first interior support surface, said first bone space being configured to receive a first portion of the humerus, wherein a second bone space is defined between said distal outer stem periphery and said second interior support surface, said second bone space being configured to receive a second portion of the humerus, said second bone space being contiguous with said first bone space, wherein said first body defines a first body longitudinal centerline, wherein said stem defines a stem longitudinal centerline, wherein said first body longitudinal centerline and said stem longitudinal centerline are coincident, and wherein said first body and said second body collectively are generally configured to be in the shape of a sector of a hollow sphere.