Electric toothbrush: how it works

In short: Electric toothbrushes move the brush head mechanically with oscillating, rotating, or sonic motions, cleaning more thoroughly than manual scrubbing alone. Studies show they remove plaque more effectively on average than manual toothbrushes.

In more detail: A small electric motor in the handle sets the brush head vibrating, with frequency and movement pattern varying greatly depending on the technology.

In detail

• Oscillating-rotating: The round brush head alternates spinning in both directions, mechanically loosening plaque.
• Sonic toothbrushes: High-frequency vibrations of up to several thousand movements per minute also create microbubbles in the toothpaste that loosen deposits.
• Pressure sensing: Many models warn when pressure is too strong to protect gums and enamel.
• Timer function: A built-in timer often divides the recommended two-minute brushing time into equal segments for each mouth region.
• Rechargeable battery instead of disposable: Modern devices usually charge inductively on a charging station, which handles bathroom moisture better than exposed contacts.
• Brush head replacement: The attachment should be replaced every three months, regardless of the rest of the device, since the bristles wear down.
• Dental health: Regular, thorough brushing remains more important than the choice of toothbrush itself (zahnpflege-richtig).