A STUDY ON THE DENTAL MATURATION IN CHILDREN WITH SKELETAL ANTERIOR CROSSBITE

Shin, Jong-Hyun; Kwon, Min-Seok; Kim, Shin; Jeong, Tae-Sung

Journal of the Korean Academy of Pediatric Dentistry 2010;37(3):359-366.
Published online August 31, 2010.

A STUDY ON THE DENTAL MATURATION IN CHILDREN WITH SKELETAL ANTERIOR CROSSBITE

Jong-Hyun Shin, Min-Seok Kwon, Shin Kim, Tae-Sung Jeong

Department of Pediatric Dentistry, School of Dentistry, Pusan National University

골격성 전치부 반대교합 아동의 치아성숙도에 관한 연구

신종현, 권민석, 김신, 정태성

부산대학교 치의학전문대학원 소아치과학교실

Correspondence: Shin Kim, Tel: 055-360-5180, Email: shinkim@pusan.ac.kr

Received: 15 July 2010 • Accepted: 13 August 2010

Abstract

It was easy to find that children of a skeletal anterior crossbite in the early mixed dentition period showed a stark difference in the dental maturity between their maxillary and mandibular teeth, if they have stronger physical characteristics. If the difference of dental age between maxillary and mandibular teeth which can be identified via panoramic radiographs may serve as an early sign of class III malocclusion, this is considered valuable as a tool of early detection diagnosis. We obtained lateral cephalometric radiographs, panoramic radiographs, working model and clinical images of patients of Hellman dental age IIA and IIC who visited the department of pediatric dentistry, Pusan National University Dental Hospital and examined them to select 50 patents for normal occlusion group and skeletal anterior crossbite group, respectively. Their panoramic radiographs were used for the Demirjian's method to figure out dental ages of maxillary and mandibular teeth of each group and the eruption rate of the first molars. Their differences are as follows: 1. In both groups, the dental ages from Demirjian's method were advanced than the chronological ages. No sexual dimorphism was detected for the chronological or dental age in either group (p>0.05). 2. The difference of dental age of maxillary and mandibular teeth between the normal occlusion group and crossbite group was 0.22 and 0.69 years, respectively, with a higher difference in crossbite group(p<0.05). 3. Compared to the normal occlusion group, the crossbite group showed a higher difference in the eruption rate between maxillary and mandibular first molar(p<0.05).

Key Words: Dental Maturation, Skeletal Anteiror Crossbite, Dental age, Demirjian’s method Abstract