Composite fillings are the most popular and desirable material to restore minor cavities in teeth. The composite resin when initially placed in the cleaned and prepared tooth has the consistency of modeling clay. In order for the composite to harden, we shine a bright blue L.E.D. light directly above the tooth to set, or “cure”, the filling material. Through a series of chemical reactions, the composite resin hardens into a very strong material that looks very much like a natural tooth. Today’s composite fillings are incredibly indistinguishable from natural tooth structure and have nearly the same strength as the tooth structure they replace.