Everyone should clean his
teeth a tleast a couple of times
a day. Dental research shows
that cleaning one's teeth for three
minutes at a time is best: longer
periods may damage the gums, whereas the gums may not be
massaged sufficiently, nor the
plaque removed adequately, if
the period is shorter. Some manufacturers
have therefore started
to build in timers in their electric
toothbrushes that give a
signal after three minutes.
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