Dear Anthony,

I can definitely see how this seems like a clever marketing ploy. The truth is that although only a few brands have replacement indicators, these colorful bristles or indicators are simply a helpful and important reminder to regularly replace your toothbrush.

To keep working effectively, toothbrushes must be replaced at least every three months. In fact, studies have shown that a new toothbrush is 30% more effective at removing plaque than your worn-bristled old one. With time and regular use, toothbrush bristles become more porous, which allows bacteria and fungus to grow.

There are also other good reasons to replace your toothbrush, such as after a cold or if someone else uses it. Even if you use a toothbrush sanitizer however, we suggest that you replace your toothbrush whenever the bristles look worn or after three months of use, which ever comes first.

So you may have to buy a replacement brush a little more often, but it’s a small price to pay for clean and healthy teeth!