Reinforced arthroplasty stems with integrated threaded bosses and internal walker-type compression

An orthopedic implant configured to be implanted in a bone comprising;

• a stem body comprising a longitudinal axis and a bore intersecting the longitudinal axis, wherein the bore comprises an internal ramp oriented at an acute angle relative to the longitudinal axis, the ramp comprising a thread configured to define a mechanical interaction pathway with a screw;
• a screw configured to interact with the threaded internal ramp, such that rotational advancement of the screw along the internal ramp produces axial translation of the stem body further within the bone through direct surface interaction, wherein the screw is perpendicular to the longitudinal axis during advancement, and wherein the axial translation is generated during advancement of the screw;
• one or more threaded bosses formed on the stem body and one or more fixation elements configured to be received by the one or more threaded bosses;
• wherein axial translation generated by rotational advancement of the screw establishes a compressive force that is transmitted through the stem body to the threaded bosses;
• and
• the threaded bosses engage the fixation elements to resist displacement and thereby maintain the compressive state of the implant.