Fluoride Ions Can Replace Hydroxyl Ions in the Hydroxyapatite Crystal

question 21

Multiple Choice

Fluoride ions can replace hydroxyl ions in the hydroxyapatite crystal lattice of teeth.This fluoridated hydroxyapatite,or fluorapatite,is more soluble and makes the tooth less resistant to demineralization.

• A) Both statements are true.
• B) Both statements are false.
• C) The first statement is true; the second is false.
• D) The first statement is false; the second is true.

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