Tooth bonding is a cosmetic procedure that can correct tooth imperfections. This procedure can fix gaps, replace missing teeth, cover up discolored teeth, and much more. Technically speaking a dental bonding is a type of cosmetic dentistry that uses a resin material to fill spaces in your teeth. The material is then hardened with a light or a laser, and polished to a high sheen. What is a dental resin? A dental resin is a material used as a filling in the teeth. There are various types of resin materials, with some being more sensitive to temperature and humidity than others.