Heterotopic Ossification of the Triceps Muscle after Internal Fixation of Proximal Ulna Fracture: A Case Report

The triceps brachii inserted into the posterior third of the olecranon and the proximal ulna separated the olecranon, the brachialis inserted into the coronoid process of the ulna produced tensile forces across the elbow joint during contraction, so as to separate the coronoid, thus resulting in complex fracture of proximal ulna. According to the AO principle of articular fracture management, ORIF using anatomical locking plate was performed, one day after the injury, without any complication.