toothbrush

[nismail]

for how long has a brush been in use that would reduce its plaque removing ability up to 30 per cent than a new one?

[qapmoc]

I would say that depends on many factors such as the hardness of the bristles, the material they are made of etc... but probably a fair assessment would be that when all the bristles have fallen out then it might be time to buy a new one.

[nismail]

so, for how long a brush can be use? Or brush expired date?

[Linzi84]

Dentists advise you to change your toothbrush after 3 months

[chazza]

Where are these questions coming from? This has been asked loads of times