Are electric toothbrushes really better than manual?

Yes, every meta-analysis shows electric toothbrushes remove significantly more plaque and reduce gingivitis better than manual brushing. The difference is most dramatic for people who brush poorly with a manual.

How often should I replace the brush head?

Every 3 months or when bristles fray, whichever comes first. Worn bristles reduce cleaning effectiveness significantly. Some models have indicator bristles that fade when replacement is due.

Best Electric Toothbrushes for Better Dental