The Odontoscope is used in the mouth and is therefore designed to come in contact with saliva or blood in the event of gingivitis, for example. However, the Odontoscope is less invasive than a toothbrush, which comes in contact with saliva and blood when brushing inflamed gums. The odontoscope is an individual device. It can be reused by the same person. After use, rinse the odontoscope thoroughly with clean water before storing it with your toiletries.