Review Question - QID 220118

A 60-year-old male presents to your office following a mechanical ground-level fall onto an outstretched left arm, in which he noted immediate pain and a left wrist deformity. Radiographs taken in your office are shown in Figures A and B, and the patient elected to undergo operative treatment with a volar locking plate, as shown in Figure C. Three months postoperatively, he returned to the office complaining of dull dorsal wrist discomfort for the past three weeks without antecedent trauma and absent extension of the left thumb. What is the most appropriate treatment for this patient's injury in addition to removing the culprit?