If you have a gummy smile or excessive gingival display, crown lengthening is the right procedure to address this concern. A gummy smile refers to the conditions wherein your teeth appear shorter as the excessive gum tissues partially cover them. The crown lengthening procedure can be cosmetic, or you might need it to expose decayed or broken areas of the teeth. A periodontist will perform this surgery to reveal more of the tooth structure to fit restorative equipment like a crown, bridge, etc. This procedure can be performed on one tooth, several teeth, or the entire gum line.