Patent ID: 8529629

Claim:
A shoulder prosthesis for implantation in a patient, comprising: a shaft portion for attachment to a humerus shaft of the patient, wherein the 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 including first and second opposed surfaces, wherein the fin 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 surface for receiving at least a part of a greater tuberosity of the patient and a second concavity having a 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 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 surface of the fin element extending from the body of the metaphyseal portion; wherein the first concavity and the second concavity are asymmetric; wherein the fin extends from the body of the metaphyseal portion in a generally anterior-lateral direction; wherein a free edge of the fin is offset in an anterior direction from a frontal plane of the prosthesis; and wherein a position of the free edge of the fin substantially mimics a position of essentially an entire anatomical location of a bicipital groove.