PMC4354614_01
Swelling of the lower lip and chin after 1 hour of irrigation with sodium hypochlorite.
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The patient reported severe pain and a burning sensation, and the student immediately stopped the treatment and removed the rubber dam, at which point she noticed extensive swelling of the lower lip and chin related to the treated tooth (Figure 1).
The edema spread to the sublingual and submental spaces and resulted in elevation of the tongue approximately 8 hours after the sodium hypochlorite accident. This required airway protection through oral intubation and mechanical ventilation.
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She remained intubated for 72 hours, during which the swelling started to slowly decline and the floor of the mouth became soft and nonraised (Figure 2).
A deep ulcer developed in the lower anterior buccal vestibule, in close proximity to the tooth being treated.
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At that time, intraoral examination revealed a 2 cm x1 cm ulcer in the lower anterior vestibule, extending in depth to the bone (Figure 3).