Crown Lengthening Surgery

Crown lengthening surgery is one of the commonest periodontalsurgery, we often encounter this type of aesthetic surgery when thetooth structure is too short which is caused by caries or crown fractureclinically． If the denture crown extends deeply under the gingiva, andviolate the biological width, then periodontal problems will occur.Crown lengthening surgery is abode by the principle of biologicalwidth，using the method of surgery to remove a certain amount ofgingival tissue and alveolar bone, exposing the sub-gingival teethstructure to reestablish periodontal tissue in a healthy way．Crown lengthening surgery is widely used in oral clinical variousprofessional disciplines, and recently received a good clinical effect.This paper will discuss the basic principle of crown lengtheningsurgery, indications, contraindications, operation types, surgicalmethods and postoperative nursing and tissue healing, reconstructiontime and clinical case reports, etc.