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Dr. sakina shaikh answered : 11 years ago
Hi there,you haven't mentioned since when you are having oily taste.Also,oily taste isn't because of root canal treatment. Are you under medication?if yes,may be side effects.
Dr. Rangeeth Nammalwar answered : 11 years ago
It may be due to sinus infection. Consult an ENT surgeon. Hope there is not pain in the root canal treated tooth. Use a tooth brush with a tongue cleaner.