Filling cavities with composite material differs from traditional fillings. Once the tooth is completely dry an adhesive is applied inside the tooth. Onto the adhesive is placed several layers of composite material. Once the tooth is filled a chemical that acts as a hardening agent is applied and the tooth exposed to a special light for about a minute at which point it is set and dried.
Some people notice a sensitivity to hot and cold immediately following this procedure. This is a normal reaction and should not last more than a week or so. If the cavity is particularly large, it may be difficult to chew solid or hard food. If this is the case, your dentist may recommend you use traditional materials to fill the cavity.