This lesson explains how fluoride supports the repair of early tooth damage and helps control the development of cavities. Understanding its mechanism clarifies why repeated contact with the teeth matters.
Tooth enamel is made mainly of hydroxyapatite. In the mouth, minerals are continually lost and regained. Acidic conditions encourage demineralization, the loss of minerals from enamel. When conditions allow minerals to return, remineralization occurs. Early damage can therefore be partly repaired before a cavity becomes more advanced.
All flashcards
How does fluorapatite differ from hydroxyapatite in enamel?
Fluorapatite can form when fluoride is available and is more resistant to acid than hydroxyapatite.
What are fluoride’s two principal effects on the tooth mineral cycle?
It slows enamel demineralization and supports remineralization.
What is dental fluorosis?
A change in developing teeth associated with excessive fluoride ingestion; it can range from white marks to more severe discoloration and weakened teeth.
What is the main anti-caries action of swallowed fluoride?
Swallowed fluoride has minimal effect on the tooth-surface remineralization cycle; fluoride acts mainly through local contact with teeth.
What is the usual fluoride concentration in standard toothpastes?
Most contain about 1,000–1,450 ppm fluoride.
Quiz questions
Which city became the first to fluoridate its public drinking water in 1945?Answer: Grand Rapids, Michigan
What did a Cochrane review conclude about daily fluoride supplements during pregnancy?Answer: There was no evidence they prevented tooth decay or caused fluorosis in children.
For which patients are acidulated phosphate fluoride (APF) products generally not intended?Answer: Patients with tooth-colored restorations
What is a typical fluoride varnish application interval described for preventing decay in children and adolescents?Answer: Every six months
What was the finding about sodium fluoride studied for postmenopausal osteoporosis?Answer: It can increase bone density without reducing fracture risk.
Based on the Wikipedia article Fluoride therapy, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.