Root Canal Configuration of Burmese (Myanmar) Maxillary First Molar: A Micro-Computed Tomography Study

Table 7

Incidence of 3D isthmus types at different levels of mesiobuccal and distobuccal roots

Isthmus types (3D	Mesiobuccal root			Distobuccal root
	Coronal third (%)	Middle third (%)	Apical third (%)	Coronal third (%)	Middle third (%)	Apical third (%)
Mixed complete	18 (12.08)	10 (6.71)	7 (4.70)	1 (10)	0 (0.0)	1 (10)
Mixed incomplete	9 (6.04)	8 (5.37)	2 (1.34)	0 (0.0)	1 (10)	0 (0.0)
Sheet complete	11 (7.38)	21 (14.09)	14 (9.40)	0 (0.0)	0 (0.0)	2 (20)
Sheet incomplete	6 (4.03)	3 (2.01)	1 (0.67)	0 (0.0)	0 (0.)	0 (0.0)
Tube complete	3 (2.01)	7 (4.70)	4 (2.68)	2 (20)	1 (10)	0 (0.0)
Tube incomplete	9 (6.04)	6 (4.03)	10 (6.71)	0 (0.0)	1 (10)	1 (10)
Total isthmuses in each third	56 (37.58)	55 (36.91)	38 (25.50)	3 (30)	3 (30)	4 (40)
Total isthmuses in each root	149 (100)			10 (100)