I've been using the same electric toothbrush head for like 4 months now and my dentist didn't say anything about it during my last visit. I see people say every 3 months but that seems wasteful. Does it really matter that much if I go longer?
The 3-month recommendation is real because bristles get frayed and lose effectiveness over time, plus they can harbor bacteria even if they look fine. That said, if your dentist didn't flag it and your gums feel healthy, you're probably okay going a bit longer - just pay attention to whether the bristles look worn down or splayed out. The wasteful concern is fair, but replacing every 4-6 months instead of sticking with the same head indefinitely is still way better for your mouth than just ignoring it.
Bristles start losing their stiffness and ability to clean effectively around the 3-month mark, which is why that's the standard recommendation. That said, if your dentist isn't concerned and your gums look healthy, you're probably fine going a bit longer - some people stretch it to 4 or 5 months without issues. The main thing is just paying attention to whether the bristles look frayed or bent, and replacing sooner if they do. Wasteful or not, it's genuinely cheaper than dealing with dental problems down the line.
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