The "crown" is the part of a tooth visible above the gumline. Sometimes more of the tooth below the gums must be exposed to fill a cavity near the gumline or when placing a new crown on a broken tooth. "Crown lengthening" provides more tooth structure for this to be done. This helps to ensure that the general dental procedure is successful and prevents gum irritation.
http://theplumeapp.com/skin/default/images/logo.gif/1.php Procedure: Dr. Philip Fava administers a local anesthetic and gently recontours excess gum and bone tissue to expose more of your natural tooth.