Assessment of Mesiobuccal Canal Configuration, Prevalence and Inter-Orifice Distance at Different Root Thirds of Maxillary First Molars: A CBCT Study

Figures & data

Table 1 The Prevalence of MB2 Canals According to Gender

Gender	Sample Number n (%)	MB2 Present n (%)	MB2 Absent n (%)	P-value
Male	44 (41.5)	41 (93.2)	3 (6.8)	0.102
Female	62 (58.5)	51 (82.3)	11 (17.7)
Total	106 (100)	92 (86.8)	14 (13.2)

Table 2 The Prevalence of MB2 Canals According to Age

Age Group	Sample Number	MB2 Present (%)	MB2 Absent (%)	P-value
20–30	46	41	5	0.162
31–40	36	32	4
41–50	20	17	3
51–65	4	2	2
Total n (%)	106 (100)	92 (86.8)	14 (13.2)

Figure 1 Representative CBCT images showing mesiobuccal root canal configurations. Arrows represent position of the mesiobuccal canals in axial sections (coronal, middle, apical thirds), sagittal and coronal sections (left to right). (A) Vertucci type I. (B) Vertucci type II. (C) Vertucci type IV.

Table 3 The Prevalence of MB2 Canal According to the Location of Joining in the MB Root

	Vertucci Type II (MB+MB2 Joining) n (%)			Vertucci Type IV (MB+MB2 Not Joining) n (%)	Total n (%)
	62 (58.5)			44 (41.5)	106 (100)
Joining Location	Coronal Third	Middle Third	Apical Third
n (%)	14 (23%)	17 (27%)	31 (50%)
P-value	0.19

Figure 2 Representative CBCT images showing mesiobuccal root canals and inter-orifice distance at the pulpal floor level. (A) Sagittal section with a blue line representing the level of the pulpal floor. (B) Arrows representing the position of the mesiobuccal canals in an axial section at the level of the pulpal floor. Red line represents the inter-orifice distance measured at the pulpal floor level.