A Study on the Dental Maturation in Children With Class Iii Skeletal Malocclusion of Mandibular Overgrowth Type

Abstract

In growing children it is frequently found that dental maturation is strongly influenced by the growth rate of maxilla or mandible. If there is evidence to prove this, it might be utilized as a criterion in the early diagnosis of skeletal malocclusion, even before the object's real skeletal features are yet revealed. The purpose of this study was to find out if the difference of dental maturation in over-grown mandible in children with skeletal Class III has any relationship with some skeletal features of mandible. 50 patients in Hellman dental age IIIA with normal occlusion and Class III malocclusion of mandibular overgrowth type respectively were selected as study objects. The age estimation was performed on maxillary and mandibular teeth, eruption rate of the 2nd molars of each group have been measured on panoramic radiography, and the differences in dental age of the upper and lower jaw were analyzed under Demirijian's method.The results were as follows:The difference of dental age of maxillary and mandibular teeth between the two groups was 0.66 and 1.20 years respectively, with a higher difference in the experimental group (p < 0.05). The difference of eruption rate of the maxillary and mandibular second molar was not found between two group (p >0.05).

Association between Ectopic Eruption of the Maxillary First Permanent Molar and Skeletal Malocclusion

“…The SNA, SNB, and ANB angles are the most commonly used measurements for assessing the anteroposterior relationships of the jaw and to assess skeletal malocclusion [17,18]. However,…”

Maturation of the First Molars in Primary Dentition with Class III Malocclusion

“…안 등 17) 은 상악 열성장형 골격성 3급 부정교합 아동에서 상악 제1대구치의 석회화도 및 맹출률이 낮다고 보고하였다. 류 등 18) 의 연구에서 정상 교합 아동에 비해 하악 과성장형 골격성 3급 부정교합 아동에서 상하악의 치령 차이가 큰 것으로 나타났다. 3).…”