The BioMotion Cannulated Hemi System is designed for use in a simplified, reproducible great toe arthroplasty technique. The cannulated instrumentation provides the surgeon with the ability to precisely align and implant the prosthesis while eliminating unnecessary steps. The BioMotionTMcannulated implant features a thin surface, thus reducing the amount of bone resection needed and allowing for retention of the flexor tendon attachment sites. The tapered stem matches the natural shape of the medullary canal and allows the entire surface of the stem to embed in non-broached bone. Color coded trial sizers aid in proper selection of the correct implant size and placement without the need for interim trial sizers. Five sizes offer a sufficient range to match virtually all phalanx anatomy.