Question

Fluoride content of water which causes fluorosis
A) 6 ppb
B) 100 ppb
C) 1 ppm
D) 10 ppm

Answer 1

Hint:Fluorosis typically occurs as teeth develop within the first few years of an infant. Most cases are mild. Fluorosis is not a health concern, although it is possible to prevent it.

Complete answer:
First we should know about fluoride to answer this question. Fluoride is a natural substance that prevents cavities from protecting teeth. In Canada, numerous communities insert fluoride to the local water supply. It's also used in mouthwashes or toothpastes. Children who start to use fluoride items at an early age have fewer cavities than others who do not use them.
Now, let us find the solution from the options-
- Fluorosis means you've got so much fluoride in a human. Fluorosis patients have white streaks or blotches on their teeth. They will stain these spots or turn black. Thus, option A is not the correct option.
- The proper level of drinking water is around 1 part per million (ppm), which is sufficient to avoid cavities but not so high to induce fluorosis. Thus, option B is not the correct option.
- There may also be fluoride in natural supplies of water. They should get it checked whether the water comes from springs or wells. It is healthy if it contains 1 ppm of fluoride or less. Thus, option C is not the correct option.
- If the level of fluoride in the water is greater than 1 ppm, the risk that a child will experience fluorosis is greater.

Thus, the correct answer is option (D) 10 ppm.

Note:Fluorosis will start with the lower incisors with in permanent dentition, finishing mineralization at about 2-3 years in age, and stopping after mineralization of a third molars. Hypo mineralized enamel subsurface induces the white opaque appearance of fluorosed enamel; more extreme dental fluorosis, trying to pit and degradation of the enamel surface occurs, due to secondary staining.