Periodontal procedures are available to lay the groundwork for restorative and cosmetic dentistry and/ or improve the health and aesthetics of your smile. If there is decay or a fracture under the gum line, crown lengthening can help expose more of the tooth’s crown in order to support a filling or a new crown. Crown lengthening is also performed to provide the necessary space between the bone around the tooth and the crown to prevent chronic tissue irritation after placement of the new crown.