– Stains to the enamel are caused by tobacco, coffee, and tartar build up.
– Severe decay, infection, and a dead nerve can turn teeth black.
– Some medications and supplements (such as iron) can stain the teeth and make them look darker.
To find the exact cause of black teeth, you should consult with a dentist for a thorough check up and treatment.
Read the full story here: https://www.medicalnewstoday.com/articles/321777.php