Fig. 2

Design of the 3D-printed prostheses with hemiarthroplasty for the distal humerus. Based on the radiographic appearance of the patient, preoperative discussion determined a safe osteotomy length of 20 mm proximal to the fracture line (a). The proximal end is a cement-type medullary pin and the distal prosthesis is a 3D print with four side holes at each edge of the prosthesis and one central hole (b). The profile of the prosthesis of the mirror design was compared with the portion of the patient’s distal humerus that required resection (c)