Methods After horizontal osteotomy the chin moved up and fixed with intraoral incision, implant was used in augmentation mentoplasty in order to increase heights and outshoot of the chin.

• 方法采用口内切口颏部水平截骨前移固定后,再联合利用在颏部置入合适假体的隆颏术,以进一步增加颏突度和颏长度,改善颏部形态。