If you were to judge by scientific papers alone, it’s pretty clear that for managing plaque and gingivitis, power toothbrushes seem to do a better job than manual ones. One of the most recent systematic reviews found that 69% of the studies they looked at showed that electric brushes “caused significantly greater reduction in plaque and gingivitis” than manual brushes. A 2024 meta-analysis found that oscillating/rotating brushes in particular did a better job than either sonic or manual brushes.
But if you judge by what people actually do, most still use regular old toothbrushes – and that’s perfectly fine, too. That’s because, ultimately, the type of toothbrush you use matters less than your using it regularly and with the proper technique.
After all, the fanciest, most expensive power toothbrush with Bluetooth and a dedicated hygiene app and every other bell and whistle won’t do you a bit of good if it just sits on the bathroom counter, unused.
Still, there are some areas in which power toothbrushes especially shine, and that brings us to a new study just out in the Journal of Dental Hygiene.
Researchers recruited 42 adults who had signs of gingivitis and plaque buildup, and who all habitually used manual toothbrushes. Being part of what’s known as a crossover study, each participant tried each type of three toothbrushes over a three-week period. One brush option was an entry-level oscillating/rotating electric toothbrush (the Oral-B iO2) set to “Sensitive” mode. Another was the same brush but set to “Daily Clean” mode. The third was a regular soft-bristled manual toothbrush. Everyone used the same kind of toothpaste.
Through the course of their study, the research team tracked two main outcomes: plaque removal and gum health. Plaque levels were measured after a single use of each brush and again after one week of regular use. For gingivitis, during the first treatment period only, they tracked bleeding sites and gum inflammation scores over two weeks of using their assigned product – at baseline, week one and week two.
“All participants,” they wrote, “had baseline evidence of gingivitis and plaque.”
And then things began to change – and rather quickly, too. After just one week, the electric toothbrush reduced bleeding sites at least twice as much as the manual brush. The numbers tell the story clearly:
- Using the electric brush in Daily Clean mode reduced bleeding sites by an average of 8.9 after one week and 14.02 after two weeks.
- The Sensitive mode showed similar benefits: 6.83 and 10.9 sites reduced.
- The manual toothbrush reduced bleeding by 3.41 sites at week one and 5.01 at week two.
Both power brush modes also produced far greater reductions in gum inflammation scores at week two compared to the manual brush.
The differences in plaque control appeared even faster – after just one use. The power toothbrush removed significantly more plaque than the manual brush in every area measured: whole mouth, tongue side, cheek side, between teeth, and along the gum line. After a week, the advantages persisted.
Notably, the study authors focused specifically on a basic, inexpensive electric toothbrush. They suggested that a belief that power brushes are too expensive or complicated or noisy might be what’s kept more people from ditching their manual toothbrush for electric.
Of course, that’s just the sort of thing you’d expect to hear from authors with ties to the maker of Oral-B products, Procter & Gamble, who also funded the study. Yes, really. So there’s a lot of potential for conflict of interest here.
In fairness, though, the methodology appears solid, and the findings align with previous independent research, such as the reviews mentioned above.
So we’re back where we began. Yes, a power brush can mean faster, more significant improvements in gum health – but only if that brush is used properly and regularly. An electric toothbrush sitting unused in your bathroom cabinet won’t help your gums heal. A manual brush used properly and regularly will always beat an electric brush that stays in the drawer.
