Teeth whitening works by using bleaching agents, usually hydrogen peroxide or carbamide peroxide, to break down stains on the enamel and dentin. Common causes of tooth discoloration include coffee, tea, smoking, aging, and poor oral hygiene. While whitening is effective for many people, results vary depending on the type of stains, and some individuals may experience temporary tooth sensitivity after treatment. Best dental Treatment in Dwarka Best Dental clinic near Dwarka Sector 9 best dental clinic near Dwarka sector 7