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Fluoride ion...

Fluoride ion

A

Prevents tooth decay

B

Non-essential

C

Toxic even in small quantity

D

Both B and C.

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Fluoride Ion**: The fluoride ion (F-) is derived from fluorine, a halogen element. It is commonly found in various compounds and is known for its role in dental health. 2. **Role in Dental Health**: Fluoride is recognized for its ability to prevent tooth decay. It strengthens tooth enamel, making it more resistant to acid attacks from plaque bacteria and sugars in the mouth. 3. **Water Fluoridation**: One of the primary methods of delivering fluoride to the population is through water fluoridation. This process involves adding fluoride compounds, such as hexafluorosilicic acid or sodium hexafluorosilicate, to drinking water to help reduce the incidence of cavities. 4. **Fluorosis**: While fluoride is beneficial in small amounts, excessive exposure can lead to dental fluorosis, a condition characterized by mottling of the teeth. This occurs when fluoride replaces calcium in the bones and teeth, leading to brittleness and an increased risk of fractures. 5. **Toxicity**: Fluoride is considered non-essential in small quantities and is beneficial for dental health. However, it can be toxic in large amounts, leading to various health issues. 6. **Conclusion**: Based on the information, the fluoride ion is essential for preventing tooth decay, but it can also be non-essential and toxic in large quantities. Therefore, the correct option regarding fluoride ion is that it primarily prevents tooth decay. ### Final Answer: - The correct option is: **Prevents tooth decay**.
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