Clinical application of crown lengthening surgery

Crown lengthening surgery is a hot topic in clinic research.We often encountere too short teeth structures caused by caries or crown fracture.If the denture crown margin violate the biologic width periodontal problems will occur.Crown lengthening surgery,abide by the principle of biological width,using flap surgery combined with alveolar bone trimming can extend crown or expose the subgingival teeth structure by removing part of the alveolar bone and gum so as to reestablish healthy periodontal tissue in apical direction.