A dental crown is a tooth-shaped "cap" that is placed over a tooth to cover the tooth to restore its shape and size, strength, and improve its appearance.
The crowns, when cemented into place, fully encase the entire visible portion of a tooth that lies at and above the gum line.
A dental crown may be needed in the following situations:
-To protect a weak tooth (for instance, from decay) from breaking or to hold together parts of a cracked tooth