Our recommendation is to replace your brush head every 3 months because the ultra-fine
filaments are likely to be worn out by this time, even if they don't appear to be at first glance.
If you wear orthodontic brackets or braces, it is best to change the brush head after eight
weeks as the amount of wear will be higher. We also recommend to change brush heads
after a cold, as bacteria may have accumulated on the bristles.