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Heard about this stuff over 10 years ago, says it's been in trials for 7+... ought to work. Though I use one of those electric brushes once a day and I haven't been near a dentist in 15 years, teeth are fine. If you don't let shit accumulate on them they're mostly going to be ok.
Plenty of work for dentists still, with wisdom teeth, cleft palates, teeth whitening and cosmetics and putting kids teeth into alignment...
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