EXPERIMENTAL STUDY ON THE EFFECT OF X-RAY IRRADIATION ON THE TOOTH GERM OF THE RAT

You,  Dong-Soo

J Korean Dent Assoc > Volume 16(3); 1978 > Article

Journal of Korean Dental Association 1978;16(3):193-195.
Published online March 31, 1978.

X-선이 치배조직에 미치는 영향에 관한 연구

유동수

서울대학교 치과대학

EXPERIMENTAL STUDY ON THE EFFECT OF X-RAY IRRADIATION ON THE TOOTH GERM OF THE RAT

Dong-Soo You

Dept. of Dental Radiology, College of Dentistry, Seoul National University

Abstract

The author observed the effect of x-ray irradiation on the tooth germ development of the rat fetuses. The lower right abdomen of the pregnant rats were exposed to x-ray irradiation (400 rads) on 9½th day of qestation. At 18½th day of qestation, the fetuses were removed from their mothers and histological sections of molar region were prepared. The results were as folows: 1. In the experimental fetuses, no significant changes appeared in the histological aspects of the enamel pulp, except the poor development of the innerenamel epithelium in the cusp region. 2. Pulp cells of cusp region in the irradiated fetuses were not differentiated to odontoblasts, The arrangement and population of pulp cells showed marked regional differences in the dental papilla. 3. Developmental features of dental follicle of irradiated fetuses were similar with controls.