A.Oral health expert
The root canal was done many years ago? In some cases, it is possible that the tooth can become inflamed after a long time and the root canal may have to be redone. Have you been having problems with the sinuses before?
The roots of some teeth lie in close proximity to the lining of the maxillary sinus. Sometimes, an infection of the sinus could feel like a toothache too. Be 100% sure that the tooth is problematic and that the pain is not referred from the sinus.
Consult another dentist for a second opinion.
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