Final answer:
A dental veneer is a thin covering made of porcelain or composite material that is placed over the enamel of a tooth to improve its appearance and provide protection.
Step-by-step explanation:
The enamel of a tooth can be covered with a thin layer of porcelain or composite material. This covering, known as a dental veneer, is used to improve the appearance of the tooth and provide protection. Porcelain and composite veneers are custom-made to match the shape and color of the surrounding teeth, and they are bonded to the enamel using dental cement.