Morphological Study of Root Canals of Maxillary Molars by Cone-Beam Computed Tomography

Table 6

Prevalence of a second canal in the mesiobuccal root (MB2) according to sex, age group, and dental arch of the patient evaluated.

	Sex		Age group				Arch
	Male (n = 438)	Female (n = 562)	Children (n = 28)	Adults (n = 845)	Middle-aged (n = 114)	Older adults (n = 13)	Right (n = 505)	Left (n = 495)
MB2	311	373	21	572	81	10	332	352
	(71.0%)	(66.4%)	(75.0%)	(67.7%)	(71.1%)	(76.9%)	(65.7%)	(71.1%)
p value^1	0.157		0.191				0.078

¹Fisher’s exact test.