Eight cases of periodontal disease associated with the palato-gingival groove of upper incisor, were treated. Flap operation was performed as the pocket elimination procedure. In this time, the palato-gingival groove was removed. The root was made convexed smooth surface with grinding. According to post-operative observation extending from 4th month to 20th month, well-healed condition was observed in 7 cases, and gingival inflamation was occurred in 1 case because of poor maintenance.
