The authors describe an unusual case of chemical sinusitis and orbital cellulitis secondary to a sodium hypochlorite accident in a patient who had just undergone root canal treatment. The patient presented with acute. progressive symptoms of unilateral maxillary sinusitis. facial cellulitis and orbital cellulitis which began hours after root canal treatment on the ipsilateral side. https://www.roneverhart.com/Bearbrick-WALL-E-400/