Advanced caries is seen radiographically as a radiolucency that
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.
C
Explanation: A) Advanced caries appear as a radiolucency that takes on a double triangle shape, first through the enamel with the apex pointing toward the DEJ, and a second triangle base spreading along the DEJ with the apex pointing toward the pulp. This radiolucency is less than halfway through the dentin toward the pulp.
B) Advanced caries appear as a radiolucency that takes on a double triangle shape, first through the enamel with the apex pointing toward the DEJ, and a second triangle base spreading along the DEJ with the apex pointing toward the pulp. This radiolucency is less than halfway through the dentin toward the pulp.
C) Advanced caries appear as a radiolucency that takes on a double triangle shape, first through the enamel with the apex pointing toward the DEJ, and a second triangle base spreading along the DEJ with the apex pointing toward the pulp. This radiolucency is less than halfway through the dentin toward the pulp.
D) Advanced caries appear as a radiolucency that takes on a double triangle shape, first through the enamel with the apex pointing toward the DEJ, and a second triangle base spreading along the DEJ with the apex pointing toward the pulp. This radiolucency is less than halfway through the dentin toward the pulp.
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