Root Canal Configuration of Burmese (Myanmar) Maxillary First Molar: A Micro-Computed Tomography Study
Table 2
Incidence of lateral canals from main root canals and isthmus
Root
Canals/isthmus
Root thirds
Each third
Each canal or isthmus
Each root
Number of lateral canals (%)
Number of lateral canals (%)
Number of lateral canals (%)
Mesiobuccal root
Mesiobuccal canal
Coronal
0 (0)
88 (36.67)
136 (56.67)
Middle
2 (0.83)
Apical
86 (35.83)
Mesiobuccal 2 and additional canal
Coronal
0 (0)
32 (13.33)
Middle
32 (13.33)
Apical
0 (0)
Isthmus
Coronal
0 (0)
16 (6.67)
Middle
2 (0.83)
Apical
14 (5.83)
Distobuccal root
Distobuccal canal and additional canal
Coronal
0 (0)
56 (23.33)
57 (23.75)
Middle
1 (0.42)
Apical
55 (22.92)
Isthmus
Coronal
0 (0)
1 (0.42)
Middle
0 (0)
Apical
1 (0.42)
Palatal root
Palatal canal
Coronal
0 (0)
47 (19.58)
47 (19.58)
Middle
0 (0)
Apical
47 (19.58)
Total number of lateral canals (%)
240 (100)
Sixteen lateral canals occurred from the isthmuses of the mesiobuccal roots, and only one lateral canal occurred from the isthmus of the distobuccal root.
