How Often Should You Change Your Toothbrush?
Isabella Cannon
| 3 min read
When was the last time you got a new toothbrush or changed the head on your electric toothbrush? While you know toothbrushes don’t last forever, it can be difficult to determine when it’s time to replace them.
Brushing your teeth twice daily with toothpaste and a soft-bristled brush helps remove plaque and aids in gum-disease prevention. However, if your toothbrush is old and contaminated with bacteria, debris, blood or saliva, it will not be efficient. According to the American Dental Association, toothbrushes should be replaced every three to four months or more often if the bristles are visibly matted or frayed.
Signs of bad bristles
While three to four months is a good general guideline, it’s more important to look at the condition of your toothbrush. Toothbrushes lose their effectiveness over time when the bristles start to spread out or are permanently curved.
According to a study published by the International Journal of Dental Hygiene, bristle splaying appears to be a more appropriate measure of brush replacement time than toothbrush age. Splaying of the outer tufts beyond the base of the toothbrush indicates it is time to change the brush. Once bristles reach this point, they are not able to adequately remove plaque from teeth.
Electric toothbrush vs. manual
Both electric and manual toothbrushes are effective when used properly according to the American Dental Association. Many electric toothbrushes offer additional features like timers or pressure sensors, while manuals are cost-effective and easy to use without charging.
Your brushing technique and toothbrush type will also play a role in determining when to change it out. The bristles on an electric toothbrush head are shorter than those on a manual one. This means that the bristles can become worn and splayed sooner. Most electric toothbrush heads should be replaced every three months.
Other reasons your toothbrush needs a swap
Apart from the physical signs that your toothbrush shows, there are other factors to consider that may also require you to replace it.
After illness
The Cleveland Clinic recommends replacing your toothbrush after you are sick to ensure lingering bacteria doesn’t lead to reinfection or get passed on to family members. Avoid storing multiple brushes in the same holder or in a drawer together if not fully dried to prevent the spread of bacteria.
Prone to tooth decay
A fresh toothbrush can contribute to oral health prevention. According to the 2024 Oral Health Surveillance Report conducted by the CDC, nearly 21% of adults 20 to 64 years old had one or more permanent teeth with untreated decay. If you have specific dental concerns, such as periodontal disease or tooth decay, you might need to replace your toothbrush more often.
Children's toothbrushes
Children tend to brush more forcefully or gnaw on the toothbrush head, causing the bristles to wear out faster. Check children’s toothbrushes more regularly to ensure they’re in the right condition.
Tips to take care of your toothbrush
- Use gentle, circular motions to clean your teeth, without applying excessive force.
- Do not share your toothbrush.
- Rinse your toothbrush with water after brushing to remove leftover toothpaste.
- Do not soak your toothbrush in mouthwash or disinfection solution.
- Store your toothbrush in an upright position to allow it to air dry completely.
- When traveling, use a toothbrush cover to protect the bristles from dirt and bacteria.
Talk to your health care provider if you have any concerns about your dental health or experience sensitivity when brushing.
Photo credit: Getty Images
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