Review Question - QID 219835

A 29-year-old male was snowboarding over the winter holiday and sustained a dislocation injury to his dominant elbow that involved a fracture of his radial head and coronoid. He elects to have this treated non-operatively and returns to the clinic 3 months later with a flexion-extension arc of 90 degrees and a forearm stuck in neutral rotation with both active and passive prono-supination of less than 5 degrees. His current radiographs are shown in Figures A and B. Which of the following represents the best next step in management?