Unibody endoskeletal transtibial prosthetic devices and digital fabrication workflow

A transtibial prosthetic device comprising:

• a pylon configured as a unitary truss structure formed of a plurality of elongated supports interconnected at nodes and having open spaces between supports of the plurality of elongated supports, wherein the unitary truss structure has a non-repeating geometry, and at least some of the supports of the plurality of elongated supports are oriented diagonally with respect to a central longitudinal axis of the pylon and curve three-dimensionally around the central longitudinal axis;
• and
• a foot-ankle complex extending as a unitary single piece from a base of the pylon, the foot-ankle complex comprising an s-shaped posterior portion, an s-shaped anterior portion, and a sole portion;
• wherein the s-shaped posterior portion and the s-shaped anterior portion both extend from the sole portion, have upper portions with curvatures that are concentric with each other, and are separated from each other by a gap;
• and
• wherein a terminal portion of the s-shaped anterior portion is near the base of the pylon and is unconnected to the base of the pylon.