Osteosynthesis using scorpion plate for nonunion of distal clavicle fracture with small distal bone fragment: A case report

Distal clavicle nonunion is a relatively common complication of unstable, displaced distal clavicle fractures; however, its standard surgical procedure has not been fully established. We describe a case of symptomatic nonunion of a distal clavicle fracture with a very small distal bone fragment that was treated with a scorpion plate. A 63-year-old man presented with left shoulder pain after a bicycle fall 5 months earlier. Plain radiographs and computed tomography revealed atrophic nonunion of the distal clavicle with a small distal bone fragment measuring 12 mm in length. Shoulder pain interfered with his work and daily life; therefore, we scheduled surgery. After releasing the nonunion site, cancellous bone was grafted from the iliac crest. We placed a scorpion plate with two grasping arms that fixed the distal clavicular fragment without straddling the acromioclavicular joint. One year postoperatively, his pain subsided, and bone union was confirmed. Our case presents a surgical procedure for treating the nonunion of distal clavicle fractures using a scorpion plate and an autologous bone graft. This procedure is especially beneficial for cases with small distal bone fragments, because the grasping arms of the scorpion plate allow secure fixation of the distal bone fragment and bone graft without further fragmentation.