The first thing we usually notice in a person is the pearly white smile. A white shiny smile makes one more confident and self-possessed. Before getting to know how white whitening works, let’s get to know the reasons for teeth yellowing or discoloration. The tooth is made-up of an outer hard translucent layer called enamel, which protects the teeth, an inner layer known as dentin and an innermost layer consists of nerves and vessels called the pulp.
Tooth whitening is a simple procedure. Tooth whitening agents use bleaching chemicals to get into the tooth enamel and start a chemical reaction, specifically oxidation-reduction that breaks down the staining compounds leading to the whitening of discolored teeth. Most of the modern-day whiteners use one of the two chemical agents, carbamide peroxide or hydrogen peroxide.