Dental fluorosis, a tooth defect, is categorized as one of the following:

# Dental fluorosis, a tooth defect, is categorized as one of the following:

A. Hypoplasia

B. Aplasia

C. Hyperplasia

D. Heteroplasia

The correct answer is A. Hypoplasia.

Dental fluorosis is a developmental defect of tooth enamel caused by excessive fluoride intake during tooth formation, leading to hypomineralization and hypoplasia of the enamel. It results in incomplete or defective enamel formation, often presenting as white spots, mottling, or pitting.

Explanation of other options:

B. Aplasia: This refers to the absence or complete failure of development of a tissue or organ, which does not apply to dental fluorosis, as the enamel is present but defective.
C. Hyperplasia: This indicates an excessive growth or overdevelopment of tissue, which is not characteristic of fluorosis, where the issue is underdevelopment or defective enamel.
D. Heteroplasia: This term is not commonly used in dental contexts and generally refers to the formation of abnormal tissue in an inappropriate location, which does not describe dental fluorosis.

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