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Nunizworld Nunizworld
wrote...
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6 years ago
In the saliva, fluoride can remain chemically active for up to
 
  a. 15 minutes.
  b. 30 minutes.
  c. 1 hour.
  d. 3 hours.
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wrote...
6 years ago
d. Once in the saliva, fluoride can remain chemically active for up to 3 hours, effectively bathing the teeth.
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