Last updated: September 28, 2026 [Key Takeaways] Cavities form when plaque bacteria convert sugars into acid that gradually wears down tooth enamel, and brushing technique plays a direct role in how much plaque is removed each day. Common errors—brushing too hard, rushing through the recommended two minutes, or missing the gumline and back molars—can leave plaque behind even when you brush regularly. The ADA-style baseline is brushing twice daily for two minutes with a soft-bristled brush at a 45-degree angle, replacing the brush every three to four months. Calcium-rich dairy, fluoride, crunchy produce, and xylitol are among the food categories associated with cavity prevention support, though several carry specific interaction or dosage cautions. Persistent tooth pain, visible holes or dark spots, and gum swelling are signs that warrant a dental visit rather than waiting it out. This article is intended for general informational purposes and is not a substitute for pro...
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