Bonding involves adhering composite resin material to the front of a tooth. The resin is matched to the color of the tooth. This is done to repair damage done to a tooth by decay, to alter the alignment of the tooth, close gaps between teeth, or for cosmetic dentistry purposes. In order to perform bonding, first the surface of the tooth is roughened in order to accept the bonding and hold it. A gel is applied to micro etch the tooth surface, and a primer/bond agent is applied so the material adheres to the surface. Then the material itself is placed on the tooth and hardened with intense light. Finally, the composite resin material is shaped and polished to get a lustrous finish as a last step. Though bonding is mostly performed for cosmetic dentistry purposes, it plays a crucial role restoration dentistry as well.