Many dentists recommend replacing the toothbrush every three months, and some dentists recommend replacing it every 3-4 months or as soon as the toothbrush wears out.
Regardless of the toothbrush type, bristles can wear out and become less effective. Also, clinical studies revealed that a new toothbrush can remove plaque better than an old toothbrush, and it has been confirmed that the toothbrush is being used extensively to keep teeth clean and healthy.
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