What Is It?
This common procedure involves the removal of gum tissue, bone or both to expose more of a tooth’s structure.
What It’s Used For
Crown lengthening is done when a tooth needs to be restored, but there is not enough tooth structure above the gum line to support a filling or a crown.
This can happen when a tooth breaks off at the gum line, or a crown or filling falls out of a tooth that has extensive decay underneath. If your dentist wants to repair the tooth using a crown or a large filling, he or she may need to expose more of the tooth by removing some soft tissue or bone.
In rare cases, a condition called gummy smile — when an unusually large amount of gum tissue shows around the upper teeth — can be treated using crown lengthening.