Dr. Katie To says electric toothbrushes do more of the work for you if you use them right, with soft bristles and light pressure. Manual brushes work fine too if you brush for two to three minutes with good technique.
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Electric toothbrush or manual toothbrush? I get asked this question almost daily in the dental practice. And honestly, for me, I prefer having the electric brush. And typically it's because it does pretty much all the work for you. As long as you're putting it in the right position, always using a soft bristle toothbrush and not putting too much pressure, it really does a great job of removing all of that plaque buildup and getting into areas where it might be a little bit harder to reach. Now, given that fact, even for people who prefer a manual brush, that's totally okay too. As long as you're doing the right technique and putting in the correct amount of time, At least 2 to 3 minutes.