Crown lengthening is a procedure used to adjust the gum line and expose more of the underlying tooth structure. This procedure can be done for aesthetic purposes, such as to create a more even gum line, or it can be done to prepare the tooth for a new crown or bridge. During the procedure, excess tissue is removed from around the teeth, which exposes more of the enamel. Crown lengthening is often performed in conjunction with other restorative dentistry treatments such as fillings, root canals, and crowns.