Bonding is the process of adhering composite resin material that is matched to the color of the tooth to the front of the tooth. This is done to repair damage done to the tooth by decay, to close gaps between the teeth, to alter the alignment of the tooth, or for cosmetic purposes. First, the surface of the tooth is roughened so the bonding will hold. Next, a gel is applied to micro etch the tooth surface and a bond/primer agent is applied so the material adheres to the surface. Composite resin material is then placed on the tooth and hardened with intense light. As a last step, the composite resin is shaped and polished to get a lustrous finish.