A dental cap, also known as a crown, is sometimes recommended for teeth that are too worn or damaged to be repaired by other procedures. Crowns completely cover a tooth and resemble a tooth’s natural shape. They are usually made of zirconia, metal, porcelain, a combination of metal and porcelain, or sometimes gold. Our dentist will choose the best material for your mouth. Like fillings and bonding, porcelain crowns can be indistinguishable from other teeth.