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

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

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.

Three months is recommend by Dentist.

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

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.

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

I agree with @Pied_Pfeffer.

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

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

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

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.

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