Tooth-colored dental fillings, often called "composite fillings" or "filled resins," are a mixture of quartz or glass filler in a resin medium that makes a natural looking filling. The material is cured with a special light and the surface is shaped and polished, so the end result is a virtually undetectable restoration that feels natural in your mouth. Composites are strong and durable. Additionally, because these fillings are bonded to teeth instead of mechanically held in place, the process is more conservative in relation to tooth structure removal, therefore more healthy natural tooth is able to remain. This results in smaller fillings.