Why use a Sonicare ($300) over, say, those manual toothbrushes that come in five packs—or free from the dentist? The same reason that a chainsaw is better than grandpa’s saw, that’s why. It removes up to seven times more plague than a regular toothbrush, because again, chainsaw vs. regular ‘ol saw. It also comes with an unobtrusive “charging glass” and a case for travel.
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