Dental crowns (aka "caps") are placed on damaged teeth to protect, cover, or restore their shape. (They are often used if dental fillings aren't an effective solution.) Crowns may be made from metal, resin, porcelain, or ceramic material. They usually do not require any additional care over time, aside from good oral hygiene practices.
Dental crowns are used to protect teeth that have become damaged. They can also be used to hold a dental bridge in place or cover up a dental implant. It is common for dental crowns to cover a tooth recently treated with a root canal. The caps are shaped like your teeth and can be placed on top like a tight hat. Crowns help improve the shape, strength, and appearance of once-damaged teeth and, cemented into place, completely cover the visible portion of your tooth.