MICROANATOMY

DIGESTIVE SYSTEM

TEETH

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many roots do maxillary (upper) molars have versus mandibular (lower)?
A
3, 2
B
3, 3
C
2, 3
D
2, 2
Explanation: 

Detailed explanation-1: -Most MSMs have 3 roots with 3 root canals; however, variations in the root canal configuration and in the number of roots are common.

Detailed explanation-2: -The anatomical characteristics of permanent maxillary molars are complex and are generally described as teeth with three roots: Two buccal root canals and one palatal root canal[1].

Detailed explanation-3: -It has three roots [mesiobuccal (MB), distobuccal (DB), and palatal (P)] with four canals. Despite this, in some populations these variations were observed: one, two, or four roots in the maxillary first molar [18, 19, 20].

Detailed explanation-4: -They showed that 98.56% and 1.44% of the teeth were two-rooted and three-rooted, respectively. Also 65.56% of mandibular first molars had three canals, while 31.57% had four and 2.87% had two canals. Mesial roots with two canals were of type II (41.87%), type III (0.49%), type IV (53.69%) and type V (3.94%).

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