Patent ID: 8764844

Claim:
An implant for implantation in a femur, comprising: an implant stem comprising: a base portion disposed at a proximal end of the stem and a stem portion extending to a distal end of the stem, wherein the base portion has an engagement means for engaging a resected head of the femur and defining a distally-facing bone engagement surface structured for engagement with the resected head of the femur to thereby provide the implant with a single stop point to limit insertion of the stem portion into the resected head of the femur; and a tapered portion having an external tapered surface of conical or substantially conical form, said tapered surface extending from said stem portion and terminating at said distally-facing bone engagement surface such that said bone engagement surface defines a lip extending beyond said tapered surface, and wherein said tapered surface of said tapered portion is discontinuous with said distally-facing bone engagement surface of said engagement means so as to define a surface discontinuity; and a modular femoral head; and wherein said bone engagement surface defining said single stop point and said lip is defined by said implant stem and not by said modular femoral head; wherein said modular femoral head is releasably attached to said implant stem by a connector extending from said base portion of said implant stem; wherein said base portion of said implant stem does not include any portion extending distally beyond said distally-facing bone engagement surface defined by said lip, and said modular femoral head extending distally beyond said lip when attached to said implant stem; and wherein said modular femoral head is detached from said implant stem during said engagement of said bone engagement surface with the resected head of the femur to thereby provide an indication of proper engagement of said bone engagement surface defined by said lip with the resected head of the femur.