Bonding is used for cosmetic purposes to improve the appearance of a discolored or chipped tooth. It also can be used to close spaces between teeth, to make teeth look longer, or to change the shape or color of teeth. Sometimes, bonding also is used as a cosmetic alternative to amalgam fillings, or to protect a portion of the tooth’s root that has been exposed when gums recede. Bonding is the application of a tooth-colored composite resin to repair a decayed, chipped, fractured or discolored tooth. Unlike veneers, which are manufactured in a laboratory and require a customized mold to achieve a proper fit, bonding can be done in a single visit. The procedure is called bonding because the material bonds to the tooth.