Patent ID: 7556652

Claim:
A shoulder prosthesis for implantation in a patient, comprising: a shaft portion for attachment to a humerus shaft of the patient, which shaft portion includes a proximal end and a distal end; a metaphyseal portion, wherein the metaphyseal portion includes a body, a proximal end and a distal end; a fin element including first and second opposed curved surfaces, wherein the fin element extends from the body of the metaphyseal portion; and a flange portion; wherein the distal end of the metaphyseal portion abuts the proximal end of the shaft portion and the proximal end of the metaphyseal portion abuts the flange portion; wherein the metaphyseal portion includes a first concavity having a concave curved surface for receiving at least a part of a greater tuberosity of the patient and a second concavity having a concave curved surface for receiving at least a part of a lesser tuberosity of the patient; wherein the first concavity is defined at least in part by at least a portion of the first opposed curved surface of the fin element extending from the body of the metaphyseal portion; wherein the second concavity is defined at least in part by at least a portion of the second opposed curved surface of the fin element extending from the body of the metaphyseal portion; and wherein the first concavity and the second concavity are asymmetric.