Computer-Assisted 3-Dimensional-Planned Corrective Osteotomy for Symptomatic Fracture Malunion: An Ulna-Only Case Study.

We present a case of an ulna malunion managed with computer-assisted 3-dimensional planned corrective osteotomy in a patient with a history of distal radius fracture treated with open reduction internal fixation and concurrent distal ulna fracture treated conservatively. The distal ulnar diaphyseal deformity was complex and existed in multiple planes, including a clinically significant rotational deformity. Preoperative computed tomography scans were used to plan 3-dimensional guides for the osteotomy, which were subsequently printed and used during surgery. After surgery, our radiologic findings showed a high degree of accuracy and the patient demonstrated pain-free, full range of motion and returned to contact sports 4 months after surgery. This could be a reliable and precise option for complex ulnar diaphyseal malunion corrective surgery.