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A 39-year-old member asked:

How does silver nitrate help canker sores?

2 doctor answers6 doctors weighed in
Dr. Russell Lieblick
Oral and Maxillofacial Surgery 21 years experience
Nerve endings: Silver nitrate, sulfuric acid, or citric acid are common medications applied to a canker sore. It chemically cauterizes the nerve endings in the area. The result is a potentially longer lasting ulcer but it doesn't hurt during the healing period.
Dr. Donald Cohen
Oral and Maxillofacial Surgery 42 years experience
Yes and no: Silver nitrate causes pain relief by burning the surface tissue of the ulcer, then it heals. Placing a protective ointment is another option to cover the ulcer while it is healing and can be obtained from your dentist.

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Last updated Nov 27, 2017

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