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:
1.To protect a weak tooth (for instance, from decay) from breaking or to hold together parts of a cracked tooth.
2. To cover and support a tooth with a large filling when there isn't a lot of tooth left.
3. To hold a dental bridge in place.
4.To cover damaged or severely discolored teeth.
5.To cover a dental implant.
6.To make a cosmetic modification.