Patent ID: 7044975

Claim:
A joint prosthesis, comprising: a head member so sized and shaped as to be articulatable with a joint socket, the head member defining a head bore; a neck member, having a base; a plug protruding from the base so sized and shaped as to be receivable in the head bore; and a spigot protruding from the base, the spigot having a first cylinder adjacent the base, and a second cylinder having a diameter and being disposed adjacent the first cylinder, the first cylinder having a diameter greater that the diameter of the second cylinder; and a stem member, having a proximal end defining a stem bore, the stem bore sized and shaped for receiving the spigot and having a first cylindrical portion engaging the periphery of the first cylinder of the spigot by friction-tight press-fit with the first cylindrical portion of the stem bore; and a shaft extending from the proximal end and being sized and shaped for seating in a cavity of a long bone.