Patent ID: 8858646

Claim:
A hip prosthesis having a medial side, a lateral side, an anterior side, and a posterior side, the hip prosthesis comprising: a neck; and a stem defining a longitudinal axis and having a proximal portion, a distal portion, and a transition portion extending between the proximal portion and the distal portion of the stem, the proximal portion of the stem including an anterior locking surface, a posterior locking surface, and a lateral surface that angles toward the longitudinal axis of the stem in a proximal direction, at least a portion of the lateral surface including a porous layer, the anterior locking surface and the posterior locking surface of the proximal portion forming a first included angle of between six degrees and twenty degrees and defining a maximum width of the hip prosthesis measured between the anterior and posterior sides of the hip prosthesis, the transition portion of the stem including an anterior face and a posterior face that extend parallel to the longitudinal axis of the stem.