The system to implant a prosthetic device in a long bone such as a femur or a humerus includes a stem implant having a recess. The system of present invention also includes a broach to prepare the long bone that may receive the stem implant. The broach also has a recess that is similar to the recess in the stem implant. An adapter of a generally rectangular shape similar to the recess fits snugly in the recess in the stem implant. A trial neck that fits snugly in the recess formed in the adapter is also provided. A trial head may be assembled on the trial neck. A neck similar to the trial neck can be inserted in place of trial neck. A head may be assembled on the proximal end of the neck. A system for implantation of a prosthetic device in a long bone may be made available as a kit that includes at least two stems having the adapter inserted in each of the stem, at least two trial necks, at least two trial heads, at least two necks and at least two heads.