What is the term for decay that has not yet penetrated into the dentin?

Incipient decay refers to the early stages of dental caries where the demineralization process is occurring, but it has not yet progressed to the point of penetrating the dentin layer of the tooth. During this phase, carious lesions are typically located in the enamel, and if detected and treated properly, they may be remineralized or successfully managed without invasive restoration. This distinction is important in preventive dentistry, as early intervention can halt the progression of decay and preserve tooth structure.

Advanced decay, moderate decay, and severe decay refer to more progressed stages of dental caries where the decay has already penetrated the enamel and may have invaded the dentin or even reached the pulp, requiring more extensive treatment. Recognizing incipient decay allows for targeted preventive strategies, which is essential for maintaining oral health.