Assembly tool

An instrument for assembling an implant on a neck of a stem, the stem having a stem axis, the implant and neck each having a taper, such that the implant and neck are coupled via the implant and neck tapers, such that when the tapers are coupled, there is a taper axis, the instrument comprising:

• a frame having a distal portion, a middle portion having a body axis that is coaxial with the stem axis when being used with the implant and neck, and a proximal portion, the distal portion of the frame including a retaining member adapted to engage a portion of the neck and a connector adapted to engage a corresponding feature of the stem;
• a force applier retained in the proximal portion of the frame, having, when being used with the implant and neck, an axis that is coaxial with the taper axis, wherein the force applier is adapted to engage the implant, wherein the force applier axis is not coaxial or parallel with the stem axis;
• wherein as the force applier is activated, the force applier applies a force on the implant while the neck is held in place by the frame, thereby causing the tapers of the implant and neck to engage;
• wherein the middle portion includes a carriage that is adjustably positionable on the body axis in a first direction, the carriage slidably retaining the proximal portion such that the proximal portion is movable in a second direction that is perpendicular to the first direction.