Which type of caries is characterized by slow progression with a wide entrance and often few symptoms?

• A. Chronic caries
• B. Acute caries
• C. Recurrent caries
• D. Rampant caries

Answer: (A)

Slow progression with a wide entrance and few symptoms describes chronic caries. This type develops and advances gradually, allowing the tooth to mount defensive responses such as dentin sclerosis and the formation of reparative dentin. The lesion often appears brown or discolored and may feel leathery or hard on probing, spreading laterally so the cavity mouth (entrance) can look broad. Because the dentin and pulp tissues have had time to react, nerve irritation is minimal, so symptoms are often mild or absent until the decay is extensive or reaches the pulp. In contrast, acute caries progresses rapidly, with a small entrance, a soft, light-colored lesion, and more pain; recurrent caries occur at restoration margins, and rampant caries involves multiple teeth quickly.