Sir, I recently examined a patient with a quite severe stomatitis involving the tongue and buccal mucosa. It resolved speedily when the patient discontinued the use of 'Spicy Sensodyne toothpaste'. It would appear that the causative factor was Cinnamaldehyde. PubMed/Medline reveals several papers in the American and dermatology literature.
Unfortunately, though not unreasonably, the patient declined to recommence usage of the toothpaste in order to confirm the link.
I have not come across this association before and wondered whether colleagues have had this experience.
If so, then perhaps there should be wider knowledge of a connection between Cinnamaldehyde and stomatitis. Hence my letter.
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Littler, B. Cinnamaldehyde. Br Dent J 201, 321 (2006). https://doi.org/10.1038/sj.bdj.4814051
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DOI: https://doi.org/10.1038/sj.bdj.4814051
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