Is dental cavities viral or bacterial?

Dental cavities are primarily caused by bacteria, not viruses. Specifically, certain types of bacteria, such as Streptococcus mutans, metabolize sugars from food, producing acids that erode tooth enamel and lead to decay. While viruses can affect oral health, they do not directly cause cavities. Good oral hygiene and regular dental check-ups are essential to prevent bacterial growth and cavity formation.