Unless the toothbrush holder is cleaned daily,a brown discharge develops on it in several days,as this photograph shows. Also,dirt accumulates on the bristles and the plastic base of the toothbrush even if it is rinsed and washed. Microscopy has shown that bacteria multiply in the discharge and live on the bristles. This is one of the reasons why dentists and dental hygienists recommend to frequently replace toothbrushes | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / SciMAT |
Taille de l’image : | 2556 px × 2550 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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