Final answer:
A metal covering attached to a tooth to restore one or more of its surfaces is called a dental crown.
Step-by-step explanation:
A metal covering attached to a tooth to restore one or more of its surfaces is called a dental crown. A dental crown is typically made of a metal alloy, such as gold or porcelain-fused-to-metal, and it is used to protect and strengthen a damaged tooth.
The crown is placed over the natural tooth structure after any decay or damage has been removed. It restores the shape, size, and function of the tooth, making it appear natural and allowing the patient to bite and chew properly.
Dental crowns are commonly used in restorative dentistry to treat teeth with large fillings, fractures, or extensive decay.