STUDY ON THE LOCATION OF APICAL FORAMEN ON UPPER AND LOWER FIRST MOLARS

Kim,  Yung-Hai; Sunoo,  Yang-Kuk

J Korean Dent Assoc > Volume 10(3); 1972 > Article

The Journal of The Korean Dental Association 1972;10(3):149-153.
Published online March 31, 1972.

상악관제일대구치근단공위치에 관한 연구

김영해¹, 선우양국²

^¹서울대학교 치과대학 보존학교실
^²서울대학교 치과대학 재료학교실

STUDY ON THE LOCATION OF APICAL FORAMEN ON UPPER AND LOWER FIRST MOLARS

Yung-Hai Kim¹, Yang-Kuk Sunoo²

¹Dept. of Operative School of Dentistry Seoul National University
²Dept. of Material School of Dentistry Seoul National University

Abstract

The apical foramen is not always found on the very tip of the root. The apical foramen may make its exit on the mesial, distal, labial or lingual side of a root slightly short of the root apex rather than at the root apex itself. The author collected 43 upper first molars and 84 lower first molars as a samples. Apical foramens were carefully checked and examined these location on each tip. (table 1) 1. About 33% to 49% of upper cases were found on extreme tip of roots and the remaining cases were on the distal side or mesial side. 2. Except distal simple canal of lower molars, approximately 40% to 50% were located on the very tip of the root. The remaining cases were on distal or mesial surface. 3. On lower distal simple canal, about 51% of cases made its exit on distal side. The remaining cases located on the tip end or mesial side.