TI : A lateral cephalometric study of craniofacial variation in Korean child twins
AU : Lee SR; You DS
AD : Department of Dental Radiology, College of Dentistry, Seoul National University
SO : JKAMFR. 1974;4(1):21-30
PY : 1974
LA : KOREAN
CP : KOREA
AB : A study was performed to investigate the degree of similarities and differences in components of craniofacial comp lex between Korean twins and normal children by lateral cephalometric analysis.
Dimensions of S-N, S-Ba, N-Ba, Go-Me, Ar-Go and Ar-Me were plotted against linear measurement and angles of N-S-Ba and gonial against angular measurement in twins and control groups.
The lateral cephalograms of twin were composed of 88 twins aged from 7 to 12:44 males aged 10.65 and 44 females aged 9. 55, while those of 50 normalities were composed of 25 male and 25 female aged 10.9 respectively.
In order to analyze growth proportion and sexual differences, twins were divided into 3 groups according to two year age intervals and the author compared male with female in 3 groups. For the purpose of observing similarities and differen ces in twins and normalities by sex, total twins were compared with normalities.
The obtained results were as follows:
1. There was no difference in craniofacial complex between twins and normalities.
2. In general, the measurements of male were larger than those of female in both twins and normalities, but there were no statistical significances of sexual differences in both groups.
3. The growth proportion of mandible by aging was larger than that of face in twins.
4. The growth pattern of gonial angle showed slight reducing tendency in twin by aging.
5. There was little difference in the growth proportion of both male and female.