Horizontally impacted mandibular molars may cause loss of bone, and development of periodontal pockets on the distal root surface of adjacent second molars. The reported patient was confirmed to have aggressive periodontitis. The aim of this presentation is to describe a novel view of a complex treatment approach to promote periodontal healing in a patient.Our study presents the results of a patient with generalized aggressive periodontitis, horizontally impacted left third mandibular molar, and a second molar with a deep periodontal pocket. The treatment concept was recommended based on the idea of "one-stage treatment". The removal of the third molar was followed by deep scaling and root planing, and the xenogenic grafting material was placed on the bone defect. The flap completely covered the wound. The patient received systemic antibiotics.The probing pocket depth was 9 mm before surgical treatment and 0-2 mm 1, 5, and 10 years postoperatively. The radiographic bone level was 50 % before surgery and 100 % after the surgical approach.This presentation with a 10-year follow-up describes the implementation of one-stage treatment management to promote periodontal healing in a patient via full-mouth periodontal and surgical therapy (Fig. 4, Ref. 33).