Arthroscopic-Assisted Fracture Fixation and Ligamentous Repair in Dumontier Group 2 Dorsal Radiocarpal Fracture-Dislocation: A Case Report

Radiocarpal fracture-dislocations are complex and uncommon injuries often caused by high-energy trauma, characterized by volar or dorsal dislocation of the carpus with or without associated distal radius fracture. Due to the rarity of this injury, the definitive treatment for this injury has not been well defined. We report a case of Dumontier group 2 dorsal radiocarpal fracture-dislocation in a 26-year-old patient that occurred after a motorcycle accident. We performed an arthroscopic assisted ligament repair and radial styloid internal fixation with a Herbert screw. After 6 weeks of rehabilitation, she gained 80° of wrist flexion, 75° of wrist extension, 90° of forearm pronation, 90° of forearm supination, and 87% grip strength compared to the contralateral hand with no ulnar translation of the carpus. The outcome was satisfactory.