Moderate caries is seen radiographically as a radiolucency that has:
a. penetrated less than halfway through the enamel.
b. penetrated over halfway through the enamel but did not reach the DEJ.
c. penetrated at or through the DEJ but less than halfway through the dentin toward the pulp.
d. penetrated over halfway through the dentin toward the pulp.
b. Moderate caries appear as a radiolucent triangle with the apex pointing toward the DEJ. The radiolucency is more than halfway through the enamel but does not invade the DEJ.
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