Bonding is tooth-colored material used to fill in gaps or change the color of teeth. Bonding is more susceptible to staining or chipping than other forms of restoration. When teeth are chipped or slightly decayed, bonded composite resins may be the material of choice. Bonding also is used as a tooth-colored filling for small cavities. Additionally, it can be used to close spaces between teeth or cover the entire outside surface of a tooth to change its color and shape.