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International Journal of Dentistry
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2021
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Article
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Tab 1
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Research Article
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,