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mazingerz88's avatar

How long should we use a toothbrush before buying a new one?

Asked by mazingerz88 (25917points) May 10th, 2011

I change mine every three months but there was one time I was in a friend’s house and mistakenly used his toothbrush to clean my sneakers thinking it looked so ancient that it could not be anything but a shoe cleaning tool. I was wrong. He said he was still using it!

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12 Answers

MyNewtBoobs's avatar

How long should we, or how long do we? Two very, very different questions ;)

Seelix's avatar

Toothbrushes should be replaced every two or three months. Some people brush too hard, which makes the brushes look like they’re really old when they’re not. Also, cheaper toothbrushes’ bristles can bend very easily.

philosopher's avatar

Three months is recommend by Dentist.

marinelife's avatar

My toothbrush has instructions that say to change the heads every three months.

Pied_Pfeffer's avatar

My philosophy is to change it out when the bristles bend and are less effective. I have also been encouraged by every dentist visited to not brush so hard, as it was making the gums retract and expose the softer portion of the teeth.

I’ve read the recommendations on the toothbrush packaging that recommend replacement every three months. It seems like a marketing promotion to me. If the toothbrush bristles are still in good condition, why should it be replaced? I don’t think that they have a valid claim to an expiration date like some foods do.

MilkyWay's avatar

I think you must already know this by know, but 3 months is the Dentist’s order.

Magdalene's avatar

One should change tooth brush after three months as its hygienic as well as healthy.

Pied_Pfeffer's avatar

Now I’m curious. What happens to a toothbrush after three months that it becomes unhygienic and/or unhealthy?

philosopher's avatar

Yes the bacteria adheres to them. They actually have done studies about this.

lonelydragon's avatar

Whenever the bristles start to look worn (it may be three months or longer, depending on how hard you brush).

@Pied_Pfeffer Bacteria from your mouth and the surrounding air contaminate the toothbrush. But if you clean your toothbrush regularly, I don’t see why that would be a problem.

Pied_Pfeffer's avatar

Thank you. That makes sense. There are several articles on the internet that provide tips on how to disinfect toothbrushes.

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