Dental caries on smooth surface penetrating into dentin

This code signifies a carious lesion located on the smooth surface of a tooth that has progressed beyond the enamel and into the underlying dentin. It indicates a moderate stage of tooth decay where the demineralization has breached the outer protective layer.

Apply this code when documentation clearly indicates a smooth surface caries that has penetrated into the dentin, often identified through clinical examination, radiographs, or explorer catch. This is typically used for active lesions requiring restorative treatment.

• Ensure documentation specifies "smooth surface" and "into dentin" to differentiate from other caries stages or locations.
• Do not use for caries confined to enamel or those extending into the pulp.
• Consider laterality (e.g., right, left, upper, lower) if specified, though this particular code does not require it.