Assembly tool

A method for assembling a taper between a neck of a stem and an implant, the taper having a taper axis and the stem having a stem axis, the method comprising:

• using an assembly instrument, the assembly instrument including a frame having a distal portion, proximal portion, and a middle portion having a body axis that is coaxial with the stem axis, the distal portion of the frame including a retaining member, the instrument having a force applier, the force applier having an axis that is coaxial with the taper axis, wherein the force applier axis is not coaxial or parallel with the stem axis;
• inserting the neck into the retaining member of the frame;
• inserting the implant into the proximal portion of the frame;
• and
• applying a force to the implant along the force applier axis while the retaining member of the frame holds the neck in place, thereby assembling the tapers.