A STUDY ON THE MORPHOLOGICAL CHANGES IN CHILDREN WITH CLASS I AND III MALOCCLUSIONS: CEPHALOMETRIC ANALYSIS

Hong, Han Young; Choi, Yeong Chul

Journal of the Korean Academy of Pediatric Dentistry 2007;34(4):599-612.
Published online November 30, 2007.

A STUDY ON THE MORPHOLOGICAL CHANGES IN CHILDREN WITH CLASS I AND III MALOCCLUSIONS: CEPHALOMETRIC ANALYSIS

Han Young Hong, Yeong Chul Choi

Department of Pediatric Dentistry, College of Dentistry, Kyung Hee University

I급과 III급 부정교합 어린이의 두개안면골 형태의 변화에 관한 연구

홍한영, 최영철

경희대학교 치과대학 소아치과학교실

Correspondence: Yeong Chul Choi, Tel: 82-2-958-9371, Email: choiyc@khu.ac.kr

Abstract

The present study was designed to compare the morphological and structural differences of craniofacial structures among 146 children with Class I and Class III malocclusions. The results below were obtained from the study. 1. Sphenoethmoidal synchondrosis continues to grow later in Class III. 2. Anteroposterior length of the nasomaxillary complex was significantly shorter in Class III, but the height of the nasomaxillary complex was similar. 3. Mandibular length and mandibular body length were longer in Class III, but had no statistical significance. Lower anterior facial height was shorter in Class III, but had no statistical significance. 4. Dentoalveolar height was similar between Class I and Class III. 5. In Class I, anterior cranial base took part in the anteroposterior length of the nasomaxillary complex and the mandible. 6. In Class III, anterior cranial base and middle cranial base had higher correlation with the mandible with aging. These results suggest that there exist a little differences between Class I and Class III malocclusions at age 7~11, but growth patterns are mostly similar. Therefore it is necessary to correct Class III malocclusions at an early age before skeletal differences appear.

Key Words: Class Ⅲ malocclusion, Class Ⅰ malocclusion, Craniofacial growth