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What is the name of the process by which fluoride ions make tooth enamel harder?

Options

  1. AFluoridation
  2. BHardening
  3. CCrystallization
  4. DFluorapatite conversion

Correct answer

D. Fluorapatite conversion

Step-by-step solution

Fluoride ions convert hydroxyapatite in tooth enamel into fluorapatite, making it harder and more resistant to decay.

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