Role of a spanning plate as an internal fixator in complex distal radius fractures.

Objective Minimally invasive temporary internal wrist arthrodesis as an alternative treatment method in complex distal radius fractures. Indications Complex distal radius fractures with dorsal and/or palmar comminution and little to no reconstruction possibilities, radiocarpal ligamentous injury, need for early weight bearing through the affected wrist (walking aids). Contraindications Complex hand injuries limiting the possibility to safely secure the plate at either the metacarpal or the radial shaft. Surgical technique Percutaneous or open reduction and fixation of the distal radius fracture. Determine the location for the two stab incisions under fluoroscopy; one over the distal radial diaphysis and one over the second or third metacarpal. A third incision over Lister's tubercle allows transposition of the extensor pollicis longus (EPL) tendon, excision of the posterior interosseous nerve and dorsal arthrotomy. Retrograde insertion of the spanning plate. Placement of a first nonlocking screw through the glide hole into the metacarpal shaft. Under traction, a proximal screw hole is filled with a nonlocking screw into the radial diaphysis. Tightening of the cortical screws under lateral fluoroscopic view. The remaining screw holes at both the distal and proximal ends of the plate are filled with locking screws. Layered wound closure. Postoperative management A removable wrist splint is worn during 2 weeks. Weight bearing through the injured wrist is immediately allowed. Removal of the spanning plate is scheduled at 3 months after radiographic evidence of fracture consolidation. Results In total, twelve distal radius fractures were treated by dorsal spanning plate fixation between January 2018 and January 2019. Average age was 53.3 ± 24.5 years (range 22-95 years). Both 3.5 mm and 2.4/2.7 mm plates were used. All twelve fractures were healed after 3 months. The mean Disabilities of Arm, Shoulder and Hand (DASH) score was 36.4 (range 8.3-70.0). There was one EPL tendon rupture, one case with extensor tendon adhesions, one periosteosynthetic fracture of the radial shaft and one complex regional pain syndrome. There was no implant failure and no infection.