Many cavities can be easily fixed using a white filling that mimics the color of the natural tooth. White colored fillings are called composite resins. A composite is a plastic material that contains microscopic filler particles (usually quartz or silica) to give it added strength. It actually bonds to the tooth so that it will stay in place well. White fillings do have their limitations and often teeth with very large cavities with a lot of tooth structure missing are not good candidates for white fillings.
When we place a white filling we first make sure that the tooth is thoroughly numb. White fillings will not bond well to a tooth in the presence of moisture so we use a rubber dam (explained below) to keep moisture (saliva) away from the tooth and to keep all of our materials out of your child’s mouth. We remove the decay and shape the tooth with a dental handpiece. We treat the tooth with some bonding materials and then we add the composite resin (white filling). The composite material is putty-like and we can shape it so that it ends up looking just like the tooth originally did. We shine a bright UV light on the tooth and this light causes the composite to harden very similar to tooth structure. We polish up the filling and the next thing you know we have completed a white tooth colored filling that looks almost exactly like the original tooth!