하악(下顎) 구치부(臼齒部) 분절골절단술(分節骨切斷術)에 의(依)한 구치부(臼齒部) 교차교합(交叉交合)의 치험례(治驗例)

SURGICAL AND ORTHODONTIC CORRECTION OF POSTERIOR SCISSOR BITE BY THE POSTERIOR MANDIBULAR SEGMENTAL OSTEOTOMY

This is to report a case of surgical and orthodontic of posterior scissor bite, deep bite and gummy smile by the segmental osteotomies. The surgical thechnics procedures used are Peterson's mandibular posterior segmental osteotomy, modified $K{\ddot{o}}le$ technic for mandibular anterior segment and Wunderer'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.