Why Teeth Turn Yellow?
Before we go over the process of teeth-whitening, let's take a moment to understand the causes of discoloration in teeth.
Each tooth is made up of an inner dentin layer and a hard outer enamel layer, which essentially protects the teeth. Things like food, cigarette smoke, coffee, and etc. naturally create an additional layer on top of the enamel later. This extra layer on top is the biggest cause to the discoloration of our teeth.