Recently after brushing my teeth I noticed little black dot on one of my wisdom teeth. I tried to clean it with my toothbrush but I couldn't remove it even with intensive brushing on the tooth. I take a good care of my teeth. Besides just a couple of weeks ago I had an appointment at my dentist office and everything was fine. Could be a cavity or simply staining. I don't smoke, drink alcohol, coffee, soda or eat sugary food so both options surprise me.
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