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Should Have Changed Sooner: Dentist Reveals How Often to Replace Your Toothbrush and How to Choose the Right One

Health-and-beauty12 May 2026 18:45 GMT+7

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Should Have Changed Sooner: Dentist Reveals How Often to Replace Your Toothbrush and How to Choose the Right One

The world "changes" often, but if you want bright, beautiful teeth that stay the same, start with "changing your toothbrush." Many people may think it’s fine to keep using it as long as the bristles haven’t fallen out. But from a dentist’s perspective, this small tool is crucial for oral health and requires close care.

Dentists emphasize: how often should you change your toothbrush?

According to information from the Dental Council and expert dentists, it is advised that we should change our toothbrush every 3-4 months at minimum. The reason isn’t just worn bristles that can’t clean properly, but also the "silent enemy" that we cannot see.

1. A breeding ground for biofilm (bacterial film) Dentists explain that every time we brush, food particles and bacteria get caught in the bristles. No matter how well you rinse, if you use the same brush for more than 4 months, it becomes an ideal home for germs that can cause gum inflammation.

2. Worn-out bristles When bristles start to splay, dentists compare it to using a worn-out broom to clean your house. Not only does it fail to reach between teeth, but stiff, splayed bristles can damage tooth enamel and poke the gums, causing sores.

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3 warning signs to "change your toothbrush" immediately without waiting for the scheduled time

Besides tracking time, dentists advise watching for these signs and replacing your brush right away if they appear.

  • After recovering from illness Whether a cold, sore throat, or COVID-19, dentists recommend changing your toothbrush immediately because viruses may still linger between the bristles.

  • Fading color indicator Many new toothbrush models have "color bands." If the color fades by more than half, this is a manufacturer’s signal that its effectiveness has decreased.

  • White or black residue at the base of bristles This might be toothpaste buildup or mold, which is very unhygienic.

How to choose a toothbrush for better oral health

For better dental health, here are some selection tips:

  • Bristles must be soft to reduce damage to gums and teeth.
  • A compact, rounded brush head to reach the back molars, which are prone to decay.
  • An ergonomic handle helps control direction and pressure evenly.

Remember this clearly: how often you should change your toothbrush. Following dentists’ advice not only keeps your teeth clean but is also a worthwhile investment to prevent future dental expenses. So, don’t forget to check your toothbrush tonight and see if it’s time to "change your brush." Yet?