Patent ID: 7988736

Claim:
A press-fit prosthesis for replacing a portion of a bone comprising: a tibial tray devoid of apertures passing there through having: a medial portion; a lateral portion; a center portion between the medial portion and the lateral portion; a first side; and a second side opposite the first side, the second side operable to engage the bone; and a pair of first resorbable fixation members coupled to the second side at the medial portion and a pair of second resorbable fixation members coupled to the second side at the lateral portion, the resorbable fixation members do not extend through to the first side, the resorbable fixation members are coupled offset from the center portion of the second side, the resorbable fixation members substantially resist movement of the prosthesis relative to the bone; wherein the resorbable fixation members resorb at a rate that enables bone in-growth to fixedly couple the prosthesis to the bone; wherein the center portion is devoid of a fixation member; and wherein the second side includes a roughened portion confined to an area immediately surrounding each of the resorbable fixation members, each of the roughened portions are separate and spaced apart from one another.