Patent ID: 8690875

Claim:
A method for preparing a long bone having a long axis, comprising the steps of: selecting a distal cutting instrument having a proximal end, a distal end having at least one cutting edge, and a shaft with a mechanical stop feature; reaming using the distal cutting instrument along a longitudinal axis to remove bone from a distal portion of bone thereby leaving a cavity along the long axis of the long bone; leaving the distal cutting instrument within the long bone; selecting a proximal cutting instrument having at least one cutting edge, a shaft portion, and a bore; guiding the bore of the proximal instrument over the shaft portion of the distal cutting instrument such that the proximal cutting instrument is co-axially aligned with the distal cutting instrument; reaming using the proximal cutting instrument along the longitudinal axis until the bore abuts the mechanical stop feature to remove bone in a proximal portion of the bone; removing the proximal cutting instrument; providing a proximal trial spacer with a frustoconical shape that matches the removed bone in the proximal portion, the proximal trial spacer having a proximal end portion with a wide end and a distal end portion with a narrow end, the proximal end portion having a mating feature; guiding the proximal trial spacer over the shaft portion of the distal cutting instrument; attaching a trial neck body having a mating feature to the distal cutting instrument; adjustably mating the trial neck body mating feature to the mating feature of the proximal trial spacer and relative to the distal cutting instrument to orient a radial position; and locking the trial neck body to the distal cutting instrument using a locking mechanism.