# Which deficiency affects tooth development?
A. Vitamin A
B. Carbohydrates
C. Vitamin E
D. Vitamin B
The correct answer is A. Vitamin A.
In vitamin A deficiency the ameloblasts fail to differentiate properly. Consequently, their organizing influence on the adjacent mesenchymal cells is disturbed, and atypical dentin, known as osteodentin, is formed.
Reference: Orban’s Oral Histology and Embryology, Thirteenth Edition, Page no 46
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