Crown lengthening is a dental procedure that involves removing gum tissue and sometimes a small amount of bone to expose more of a tooth's surface. This is typically done when there isn't enough of the tooth exposed above the gum line to properly support a dental crown or filling.

The procedure helps to create more space between the gum line and the tooth's crown, allowing the dentist to restore the tooth effectively. Crown lengthening can also be done for cosmetic purposes, such as improving the appearance of a "gummy smile."

If you have any specific questions about crown lengthening or if there's anything else I can assist you with, feel free to ask!