Aspartame is a popular artificial sweetener that does not cause cavities because it is not metabolized by oral bacteria to produce enamel-eroding acids. However, many aspartame-containing products are acidic and can contribute to enamel erosion, indirectly increasing cavity risk. Sugar-free gum with aspartame can promote oral health by stimulating saliva. Overall, aspartame is a safer alternative to sugar for dental health, but consumers should be mindful of product acidity and maintain good oral hygiene.