Extrinsic stains are on the surface of one's tooth. These take place as a consequence of environmental exposure to things that go away discoloration on your tooth enamel. Espresso, synthetic foods colorings, and smoking can all trigger this sort of staining. Your dentist then applies the whitening agent and leaves https://dallasjbrhv.gynoblog.com/26319030/fascination-about-teeth-whitening