Fluoride is used in dentistry to:

Fluoride is utilized in dentistry primarily for its ability to prevent cavities and strengthen enamel. This mineral plays a crucial role in remineralization, which is the process of restoring minerals to the tooth structure after they have been lost due to acid attacks from bacteria. When fluoride is incorporated into the enamel, it enhances its resistance to decay and can help repair early stages of tooth decay before it progresses into cavities.

It also strengthens the tooth enamel by forming a more acid-resistant mineral, known as fluorapatite. This is particularly important in maintaining oral health, especially for individuals who are prone to cavities. Regular exposure to fluoride, whether through toothpaste, mouth rinses, or professional treatments, effectively helps in reducing the risk of dental caries.

The other options do not accurately define the primary function of fluoride in dentistry. While fluoride may have ancillary benefits in other areas, its principal role is in cavity prevention and enhancing the strength of tooth enamel.