Chronic Urticaria Due to Dental Eugenol

Abstract
A case is reported of a patient with chronic urticaria. The correlation between the symptoms and dental treatment gave rise to the supposition that a root canal cement was causing the trouble. A causal relationship with eugenol, a cement constituant, could only be established through provocative oral ingestion.There is a high probability that the oral provocation tests to eugenol are relevant. Nevertheless, caution is needed when dealing with chronic urticaria.

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