Mercury silver fillings have the disadvantage of being metallic looking and turn black as they age. If your goal is to create an incredible smile, the dentist will probably use white fillings as a cosmetic tool to help create your esthetic and beautiful smile. Many brands of white filling materials are approved by the American Dental Association for use with in the back of the mouth. When possible, however, we feel it's best to use a white filling material because mercury is a dangerous substance. The argument in the US is whether it's harmful in man.
White fillings contain no mercury and once placed into a tooth, they are often hard to see.
Years ago, white fillings were not strong enough to replace much of a tooth, however, modern dental techniques have been developed to strengthen larger white fillings . Most white fillings are placed directly into a tooth and hardened right after the dentist prepares a tooth. In another white filling technique, called indirect white fillings , the dentist make a model of your tooth, makes the white filling on the model, and then inserts the white filling into your tooth. The indirect technique allows the dentist to harden the white filling more than if the white filling had been placed directly into your tooth. White fillings also look great in the front of your mouth.