Studies on the Resorption of Mandibular First Deciduous Molar

Hahn,  Se-Hyun

J Korean Dent Assoc > Volume 17(7); 1979 > Article

Journal of Korean Dental Association 1979;17(7):525-528.
Published online July 31, 1979.

하악제1유구치의 흡수에 관한 연구

한세현

서울대학교 치과대학 소아치과학교실

Studies on the Resorption of Mandibular First Deciduous Molar

Se-Hyun Hahn

Dept. of Pedodontics, College of Dentistry, Seoul National University

Abstract

958 healthy Korean children aged from 2 to 11 years old (male: 500 female:458) were studied on the root resorption of the mandibular first deciduous molar. The Results were as follows: 1. The resorption of mandibular first deciduous molar in female was earlier than male. 2. The patterns of the initial resorption of mandibular first deciduous molar were as follows Distal root is resorbed by the Successor ; 55.92% Both roots are resorbed by the Successor simultaneously ; 30.51% Mesial root is resorbed by successor ; 6.33% Mesial root is resorbed by the mandibular first bicuspid and canine ; 4.08% Bifurcation area is resorbed by the successor; 3.16% 3. The Exfoliation period of mandibular first deciduous molar was 10 years 1month in female and 10 years 4 months in male.