This is to report a case of surgical and orthodontic correction of posterior scissor bite, deep bite and gummy smile by the segmental osteotomies. The surgical thechnics procedures used are Petersons mandi-bular posterior segmental osteotomy, modified Ko1e technic for mandibular anterior segment and Wun-derer`s maxillary anterior segmental osteotomy. The results are as follows: 1) Peterson`s mandibular posterior segmental osteotomy could be achieved by the buccal approach with some difficulties in accessbility. 2) Upper and lower anterior segmental osteotomies were followed separately to correct the deep curve of Spee, deep bite and gummy smile in shortened period. 3) All alveolar segments were immobilized in preplanned position by the prefabricated palatal and lingual resin splint, therefore intermaxillary fixation was not necessary.