Metal Free Fillings or Bonding - Silver mercury fillings are obsolete. They expand and contract over time and always have recurrent decay at the margins. Natural tooth colored fillings (bonding) are now used to replace old silver mercury fillings with decay, cracked or chipped teeth, gum recession, and generalized tooth decay. Bonding utilizes a composite resin to restore, close gaps, reshape or recolor your smile. After preparation, we place the resin on the tooth, and in a few seconds with the aid of additional light, the filing is hardened. The end result is a tooth that looks and feels natural.