From: The morphology of permanent maxillary first molars evaluated by cone-beam computed tomography among a Yemeni population
Gender
Absence of MB2
Presence of MB2
Frequency
(%)
Male
23
(14.2%)
139
(85.8%)
Female
43
(20.5%)
167
(79.5%)
Total
66
(17.7%)
306
(82.3%)
X2
P = 0.07