혼합치열 및 영구치열기에서 mesh diagram을 이용한 3급 부정교합자 악안면구조의 위치변화에 관한 비교 연구

A COMPARATIVE STUDY ON THE POSITIONAL CHANCES OF CRANIOFACIAL STRUCTURES BETWEEN MIXED AND PERMANENT DENTITION IN CLASS III MALOCCLUSION BY MESH DIAGRAM

For the purpose of interpretation of positional changes of craniofacial structures in Class III malocclusion between mixed and permanent dentition, 73 normal samples and 103 Class III samples of mixed dentition and 125 normal samples and 168 Class III samples of permanent dentition were selected. Comparative cephalometric analysis was undertaken between them respectively by mesh diagram method to evaluate the positional changes of maxilla and mandible in anteroposterior direction and vertical direction and also the inclination changes of maxillary and mandibular incisors in labio-lingual direction. The following results were obtained : 1. The antero-posterior positional changes of the maxilla and mandible were posterior direction of maxilla and anterior direction of mandible. 2. The vertical positional changes of the maxilla and mandible were superior direction of both maxilla and mandible. 3. The labio-lingual inclination changes of the maxillary and mandibular incisors were lingual direction of both maxillary and mandibular incisors.