Intramedullary bone fixation devices, systems, and methods

A system for intramedullary bone fixation, comprising:

• a guide that includes a bone apposition port that defines a channel through the bone apposition port, wherein the bone apposition port is configured such that the channel aligns with an intramedullary canal of a bone when the bone apposition port is positioned apposed to the bone;
• an intramedullary bone fixation device that includes:
• an elongate member that includes a proximal section, a distal section, and a transformative section disposed between the proximal section and the distal section;
• wherein the proximal section includes a first threaded section on an outside surface of the proximal section, and wherein threads of the first threaded section have a first pitch;
• wherein the distal section includes a second threaded section on an outside surface of the distal section, and wherein threads of the second threaded section have a second pitch that is different from the first pitch;
• wherein the transformative section includes a plurality of segments disposed in a vertical arrangement between the proximal section and the distal section, each segment of the plurality of segments including a male engagement portion of the segment and a female engagement portion of the segment, and wherein one or more inner surfaces of the segments define an aperture through the transformative section, the one or more inner surfaces also defining threads;
• and
• a screw adapted to be operably placed through the aperture, the screw including a first set of threads on an outer surface of the screw adapted to engage the threads on the one or more inner surfaces of the segments;
• and
• wherein the screw also includes a second set of threads on a distal portion of the screw and a third set of threads on a proximal portion of the screw, each of the second and third sets of threads having a pitch that differs from a pitch of the first set of threads.