Description

This cross-sectional view of a tooth illustrates stage D2 of dental caries, as classified radiologically. At this stage, the decay has penetrated through the enamel and entered the dentin, reaching the outer third of the tooth. The enamel shows evident breakdown at the surface, and the darkened area of demineralization extends into the underlying dentin tissue. This stage represents a shift from a reversible to an irreversible process, as the carious lesion now affects the softer, more vulnerable dentin layer. This detailed visual serves as a valuable tool for dental education, helping both students and patients understand the early involvement of dentin in the progression of tooth decay.