A dental filling is a type of restorative dentistry treatment used to repair minimal tooth fractures, tooth decay or otherwise damaged surfaces of the teeth. Enamel loss is a common component of tooth decay and may result in tooth sensitivity. In many cases, tooth sensitivity caused by enamel loss will be significantly improved or completely eliminated once an appropriate dental filling material is placed. Long-lasting composite fillings have become the material of choice for restoring decayed teeth. Because they can be bonded to tooth structure, they can be placed much more conservatively than silver fillings, which require a large cavity preparation with undercuts to hold the material in. Plus, they're white!