When decay occurs below the gumline, it may be necessary to remove a small amount of bone and gum tissue. Your dentist may ask for this procedure before he or she makes a new crown for your tooth.
This procedure is usually performed with a laser to avoid incisions.
Sometimes crown lengthening is done to improve a "gummy" smile because the teeth appear short. The teeth may actually be the proper length but excess gum tissue may be covering these teeth. During this procedure, excess gum and bone tissue is reshaped to expose more of the natural tooth.