What term describes lesions where enamel loss has exposed dentin and they darken with staining?

• A. White spots
• B. Brown cavitations
• C. Enamel pearls
• D. Demineralized halos

Answer: (B)

When enamel loss progresses to create a cavity that exposes the underlying dentin, the lesion often appears brown because dentin readily takes up stains and bacterial byproducts, making the exposed area darken with time. This stage reflects cavitation with dentin exposure, which is best described as brown cavitations. In contrast, early caries appear as white spots on enamel where demineralization has begun but the surface is still intact; other terms like enamel pearls or demineralized halos describe different features not related to cavitated dentin exposure.