Too much of a good thing is not always good for you and this applies to brushing and flossing teeth which are both vital to good dental care but can be overdone. Tooth enamel can be damaged by too much brushing while gums are also susceptible to damage by over flossing.
A good dentist will offer advice but the basic rules for good dental care are:
– Brush teeth twice daily
– Use a soft-bristled brush
– Floss gently once a day
This is the accepted regimen for healthy teeth as it is possible to “clean them too much” and further information can be found at https://yourdentalhealthresource.com/is-it-possible-to-brush-floss-and-clean-your-teeth-too-often/.