Hi9 | Teeth Whitening | Dr. Snigdha Gowd | Orthodontics & Dentofacial Orthodontics | Dr.Gowd's Dental Hospital - There are two types of stains

1) Intrinsic Stains

2) Extrinsic Stains

Intrinsic Stains is formed when tooth is yet developing, Extrinsic Stains which are caused by Coffee, Smoking, pan parag