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Number of enamel rods in a maxillary molar is about:

 # Number of enamel rods in a maxillary molar is about:
A. 8 million
B. 12 million
C. 20 million
D. 30  million



The correct answer is B. 12 million.

The rods vary in number from approximately 5 million for a mandibular incisor to about 12 million for a maxillary molar. The rods are densely packed and intertwined in a wavy course, and each extends from the dentinoenamel junction (DEJ) to the external surface of the tooth.

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