A GENETIC SRTUDY ON THE DIMENSION OF DENTAL ARCHES IN TWINS

Kim,  Nam-Il; Yang,  Jung-Kang; Kim,  Man-Su

J Korean Dent Assoc > Volume 9(1); 1971 > Article

The Journal of The Korean Dental Association 1971;9(1):43-48.
Published online January 31, 1971.

쌍생아의 치열궁크기에 관한 유전학적 연구

김남일¹, 양정강², 김만수³

^¹연세대학교 치과대학
^²연세대학교 치과대학
^³연세대학교 치과대학

A GENETIC SRTUDY ON THE DIMENSION OF DENTAL ARCHES IN TWINS

Nam-Il Kim¹, Jung-Kang Yang², Man-Su Kim³

¹School of Deutistry, Yonsei University
²
³

Abstract

The purpose of this study is to evaluate the influence of genetics of the dimensions of dental arches in twins. Thirty-four pairs of Korean twins, of which twenty-three were monozygotic and eleven dizygotic, participated in the study. The twins ranged in age from 6 years to 12 years with mixed dentition. The results were as follows: 1) No significant differences were observed between male and female in mean interpair diffenences of monozygotic twins. 2) Mean interpair differences of monozygotic twins were lesser than these of dizygotic twins. 3) Highly significiant zygotic differences were observed in the mean interpair differences of the width of upper and lower dental arch. This suggest that there is a significant component of hereditary variability.