A dental crown is a tooth-shaped "cap" (made of precious metals and or porcelain) that is placed over a tooth to covering the tooth to restore its shape, size, strength, and improve its appearance.
The crown, when cemented into place, fully encases the entire visible portion of the tooth that lies at and above the gum line.
Bridges are false teeth that can be designed to "bridge" the gap created by one or more missing teeth. Bridges can be anchored on either side by crowns and cemented permanently into place.
A dental crown may be needed in the following situations:
1. If a tooth is cracked
2. A large filling in tooth that can cause the tooth to be more prone to break
3. A tooth that has had a root canal