Semi-longitudinal study on growth development of children aged 6 to 16

Jeong, Mi; Hwang, Chung Ju

Abstract

In orthodontic field, it is very important to understand the normal growth, Such an understanding can be derived from observation of normal growth in various samples from childhood to adulthood, and this builds a foundation from which growth abnormality or variation can be defined. Thus, a broad data collection of normal children, as well as basic study reviewing such data become necessary. The relationship between the mean values of cephalometric measurements in Growth and Development was studied among the group(boys and Girls) of Korean children from the ages 6-years to 16-years. 220 boys 170 girls were chosen as subjects : cephalometric X-ray were taken for 3 years and hard tissue analysis on McNamara and Riketts Analysis which was divided into measurements of 5 parts(Cranial base, Cranial base and Maxilla & Mandible, Maxilla and Mandible, Mandible. Dental measurements). The relationship of craniofacial growth was studied. The following conclusions were obtained: 1. There was statistically significant differences in anterior cranial base between the two sexes of 14 and 15-year groups. 2. In comparison of growth amounts among different age group, statistically singnificant difference in Posterior facial height exhisted among 10~11, 12~13 and 14~15year-old interval groups. This pattern increased with aging. 3. Na perpendicular to A showed earlier growth peak in females(11-12years) than males (12-13years). When horizontal measurements of point A and Pogonion are compared, mandibular growth appeared to be greater. 4. Maximum growth peak of cranial base and mandible was earlier in females (11-12 years) than males(13-14years). 5. Upper central incisor flared out with aging, and there were increases in lower incisor to A-Pg, and lower incisor inclination. There was significant difference between the two sexes in 10-years-old group.