If your teeth are discolored, chipped, effected by breaks and cracks, or even have gaps, bonding may be the way to go. In this simple, long-lasting and cost-effective procedure, your dentist “bonds” a natural looking, tooth-colored material called composite resins, to the enamel of your teeth. After the resin is applied to the tooth and properly shaped, it is hardened using a special light. The tooth is then smoothed and polished. Bonding usually lasts three to five years, and can even be used to protect roots exposed by receding gums and restore decayed teeth.