Oral Bacteria — Cavities start with bacteria that build up on tooth surfaces in a sticky film called plaque where they feed on sugars and carbohydrates from the foods/beverages we consume, creating acids in the process. Acids dissolve the mineral bonds in the protective layer of tooth enamel, which makes it easier for bacteria to penetrate what is otherwise the hardest substance in the human body and infect the tooth. Your unique oral "microbiome" make-up could have more or less of the microbe species implicated in dental caries, and some strains of the same bugs are more aggressive than others.

Dental hygiene — Brushing and flossing correctly and regularly helps dislodge bacterial plaque and trapped food particles. Regular checkups and professional cleanings are also important to remove plaque that has hardened into "tartar." Diet — Minimizing your intake of sugary foods and…