How often should toothbrushes typically be replaced?

Toothbrushes should typically be replaced as soon as they show signs of wear, which is generally after 8 to 12 weeks of use. This timeframe is crucial because the bristles of a toothbrush become flattened and frayed over time, diminishing their effectiveness in cleaning teeth and gums. Worn bristles cannot effectively remove plaque and food particles, making it more difficult to maintain oral hygiene. Regular replacement helps ensure that you are using a brush that can effectively clean your teeth and gums, thereby preventing dental issues such as cavities and gum disease.

The other suggested replacement timelines—every month, every six months, or once a year—do not align with the effectiveness that a toothbrush provides. Replacing a toothbrush every month may be unnecessarily frequent for most people, whereas waiting six months or a year could lead to using a brush that is no longer effective due to wear and tear.