Research

Do electric toothbrushes actually clean better than manual ones?

What was studied

A landmark Cochrane systematic review pooling 56 randomized trials (over 5,000 participants) comparing powered ("electric") toothbrushes with manual toothbrushes for removing plaque and reducing gum inflammation.

Main findings

Powered toothbrushes, particularly those with a rotating-oscillating brush head, showed a statistically significant reduction in plaque and gingivitis compared with manual brushing, both short-term (1-3 months) and long-term (3+ months) — commonly cited around 11-21% greater plaque reduction depending on the specific comparison and timeframe.

Limitations

The reviewers themselves noted the clinical importance of these differences (versus their statistical significance) remains unclear, and side effects, cost, and reliability were inconsistently reported across included studies.

What this means for patients

An electric toothbrush with a rotating-oscillating head is a reasonable, evidence-supported upgrade if you're deciding between the two — but a manual toothbrush used thoroughly and consistently is still a legitimate, effective choice, since the differences found were real but modest.