Title Page
Contents
Abstract 7
I. Introduction 9
II. Materials and methods 11
A. Study participants 11
B. Evaluation of the image 12
C. The types of root canal in primary molars 12
a) The root types of primary molars 13
b) The canal types of primary molars 14
III. Results 17
A. Root canal types in primary maxillary molars 17
B. Root canal types in primary mandibular molars 19
C. Symmetry of canal types 21
IV. Discussion 25
V. Conclusion 30
References 31
국문 초록 35
Table 1. Frequency of root and canal types in primary maxillary first molars 18
Table 2. Frequency of root and canal types in primary maxillary second molars 18
Table 3. Frequency of root and canal types in primary mandibular first molars 20
Table 4. Frequency of root and canal types in primary mandibular second molars 20
Table 5. Symmetry of canal types in primary maxillary first molars 22
Table 6. Symmetry of canal types in primary maxillary second molars 22
Table 7. Symmetry of canal types in primary mandibular first molars 23
Table 8. Symmetry of canal types in primary mandibular second molars 23
Table 9. The kappa coefficient value in primary molars 24
Fig. 1. The root types of primary molars. 13
Fig. 2. The canal types of primary molars. 14
Fig. 3. The types of root-canals (root/canal) in primary maxillary molars. (A) Illustrations. (B) Computed tomography images. The black arrow indicates the canal. 15
Fig. 4. The types of root-canals (root/canal) in primary mandibular molars. (A) Illustrations. (B) Computed tomography images. The black arrow indicates the canal. 16