13.
Which dental stain is the most common stain?
a. Pulpal disease.
b. Enamel hypoplasia.
c.
Black stain.
d. Erythroblastosis fetalis.
e. Tobacco stain.
14.
Select the exogenous stain.
a. Pulpal disease.
b. Enamel hypoplasia.
c.
Tobacco tar.
d. Porphyria.
e. Tetracycline therapy.
15.
Select the endogenous stain.
a. Green stain.
b. Fluorosis.
c.
Brown stain.
MD0513
2-17
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