Conversation: The conversation between human and AI assistant.
[|Human|] Hi. I have a problem. In between 6 or even more of my front lower teeth I have some brown stains. I do brush twice a day, rincing with mouthwash , and flossing. I went to a dentist . Got done my caveties. But I just mentioned to my doctor about those stains. I giot some speacial mouthwash. I have my next appoitment to do some cleaning. I would really like to know what is the cause of those brown stains? Thank you.
[|AI|]  Hi, Thanks for using the Chat Doctor. I am happy to ad Chat Doctor.  They're caused most commonly by tobacco products and tea and with some antibiotics. These stains adhere readily to tartar left behind. You probably see it behind your front bottom teeth because that's where we humans get the most tartar build-up (due to salivary glands down there depositing minerals). So, since they're on the outside, and nice little scraping and polishing at your next appointment from your dentist will clean them right off. To prevent them, limit the tobacco/dark