Crown-lengthening procedures can provide solutions for specific periodontal, restorative, or esthetic problems. Frequently, there is a distinct relationship between difficulties arising from periodontal anomalies and clinical problems associated with restorative or esthetic dentistry. The aim of crown lengthening, irrespective of the m ethod employed, is to provide a healthy and stable dentogingival complex. To achieve this goal, it seems appropriate to take into consideration the dimensions of the biologic width. The indications and treatment modalities for lengthening clinical crowns are discussed.