Which statement best describes the old paradigm of dental caries?

• A. An irreversible lesion resulting from progressive demineralization of tooth structure
• B. An imbalance in the remineralization/demineralization cycle
• C. Caused primarily by dietary sugar without bacteria
• D. Primarily determined by saliva pH alone

Answer: (A)

The old view of dental caries saw it as a one-way, irreversible process: a lesion forms and progressively loses mineral from the tooth structure due to acid attack, with little or no reversal. This perspective treated demineralization as the sole driver and saw the damage as something that would continue to advance unless a decay lesion was physically removed or filled. It didn’t emphasize a dynamic balance between loss and gain of minerals, nor did it highlight the protective roles of saliva or fluoride.

That’s why describing caries as an irreversible lesion from progressive demineralization best matches the old paradigm. The other statements point to the modern understanding: caries is a dynamic process governed by a balance between demineralization and remineralization; bacteria are essential in causing demineralization, not just sugar; and while saliva pH influences risk, it isn’t the sole determinant.