Which of the following is NOT listed as a risk factor for dental caries?

• A. High bacterial counts
• B. Xerostomia
• C. Inadequate fluoride
• D. Regular dental checkups

Answer: (D)

Understanding what increases the risk of dental caries versus what helps prevent it is key here. Caries risk rises when conditions in the mouth favor acid production and demineralization of enamel: more bacteria that thrive on sugars, less saliva to wash away sugars and neutralize acids, and less fluoride to strengthen enamel and aid remineralization.

High bacterial counts contribute to caries because bacteria in dental plaque metabolize fermentable carbohydrates and produce acids that dissolve tooth mineral. Xerostomia, or dry mouth, reduces saliva’s buffering capacity and its cleansing action, allowing acid to remain in contact with teeth longer. Inadequate fluoride weakens the natural defense, since fluoride promotes remineralization and makes enamel more resistant to acid.

Regular dental checkups, on the other hand, are a preventive measure rather than a risk factor. They enable professional cleaning, early detection of decay, application of preventive treatments (like fluoride varnish or sealants), and patient education to improve daily habits. While skipping checkups can contribute to higher caries risk due to missed prevention, the act of having regular checkups itself does not increase risk; it helps prevent it.