Excess presence of which of the following causes tooth decay in children?

  1. Fluoride
  2. Chloride
  3. Hardness
  4. All of the above

Answer (Detailed Solution Below)

Option 1 : Fluoride
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Detailed Solution

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The correct answer is Fluoride.

Key Points

  • The excess presence of fluoride causes the teeth of children mottled and discoloured.
  • Fluorosis is a condition that changes the appearance of tooth enamel in young children and it is a result of being exposed to too much fluoride.
  • Signs of severe fluorosis include:
    • Brown spots on tooth enamel
    • Pitting of the tooth enamel
    • Permanent damage to the teeth of children
  • Fluoride present in toothpaste or drinking water can cause mottling of children's teeth, normally caused in children less than eight years by overexposure of teeth to fluoride.

Additional Information

  • Chlorine is a necessary and effective way to kill harmful bacteria in drinking water and swimming pools.
  • Chlorinated pools and hot tubs contain pH levels that can cause enamel erosion on teeth (Swimmer’s calculus).
  • Some effects on teeth are:
    • Become discoloured.
    • The edges of the front teeth may look transparent.
    • Extreme dental sensitivity when consuming hot or cold foods.
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