Conversation: The conversation between human and AI assistant.
[|Human|] I am 29 year old and 3 of my teeth right under the gum line are turning black. I have never had any cavites or major problems with my teeth. I am a smoker so I thought maybe that could have something to do with it. Does this mean that the tooth is dead?
[|AI|]  Hi Sir, Blackening of tooth near the gum line can be because of1. Hard calculus deposit for a long time which was unnoticed or 2. Less chance to be a smoking stain since it usually involves more than three teeth3. Tooth decay which involves root of the tooth also4. Tooth wear out near the gum line which acquired stainWhatever may be the reason for your blackening, your tooth is absolutely not dead until you have any pain or swelling in relation to it. So don't worry at all. Still it is treatable. Hope your query is answered. Please don't hesitate to contact me for further queries.