Prevalence of Three-Rooted Deciduous Mandibular Molars in the Children of Northwestern Iran

Table 1

Comparison of the frequency distribution of the type of three-rooted deciduous teeth in terms of sex.

	Gender		Type of the molar			Total
			None	D	E
Gender	Girls	N#	150	10	5	165
		Percent	55.1%	62.5%	41.7%	55%
	Boys	N#	122	6	7	135
		Percent	44.9%	37.5%	58.3%	45%
χ^2(2) = 1.23,