5. 하악 유중절치가 1.62±0.31mm로 제일 얕았고 상악 제2유구치가 2.07±0.39mm로 제일 깊었다.
6. 유치열기와 혼합치열기에 있어서 치은열구의 깊이의 차이는 없었다.
[영문]
Author have measured the depth of gingvial sulcus of the primary teeth. 333 teeth were selected from the children who attended on the department of pedodontic, College of dentistry, Yonsei University, and kindergarten children at Won Ju city aged from 1 year 8 months to 10 year 2 months. 1998 point were measured.
The result were as follows.;
1. Facial surface was the shallowest in sulcus depth compared with other surfaces. It was 1.56mm. The depth of sulcus in lingual surface was deeper than facial.
2. The deepest part of each surface was mesial and distal. There were no statistical differences between mesial and distal part of the sulcus depth.
3. The mean sulcus depth of each tooth was as follows.
Primary central incisor.......1.71mm.
Primary canine................1.75mm.
Primary second molar..........2.03mm.
4. The mean sulcus depth of upper was 1.86mm, and the lower was 1.76mm. The upper tooth was deeper than lower in sulcus depth.
5. The lower primary central incisor had the shallowest sulcus and the upper 2nd primary molar had the deepest compared with other tooth
6. There wasn't specific statistical differences between the age groups of primary dentition and mixed dentition.