Fluoride helps in –
**Core Concept**
Fluoride plays a crucial role in maintaining dental health by preventing tooth decay and promoting tooth remineralization. This is achieved through its interaction with tooth enamel and the inhibition of bacterial enzymes.
**Why the Correct Answer is Right**
Fluoride works by inhibiting the enzyme enolase, which is essential for the glycolytic pathway in bacteria. By doing so, fluoride reduces the production of acid, thereby preventing tooth demineralization. Additionally, fluoride promotes the remineralization of tooth enamel by forming fluorapatite, a more stable and acid-resistant form of hydroxyapatite.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because fluoride does not primarily act as a calcium channel blocker in the context of dental health.
**Option B:** Incorrect because while fluoride may have some effects on bone metabolism, its primary action is not the reduction of bone resorption.
**Option C:** Incorrect because fluoride does not directly stimulate the production of collagen in the skin.
**Clinical Pearl / High-Yield Fact**
Fluoride's ability to inhibit enolase is a key factor in its use as a caries-preventive agent. This mechanism is distinct from its role in bone health, where fluoride primarily affects bone turnover and mineralization.
**Correct Answer: C. Prevents tooth decay and promotes tooth remineralization.**