Ultrasonic toothbrush. An ultrasonic toothbrush operates by generating ultrasound waves to remove plaque and kill bacteria. Shown is a unit made by Emmi Ultrasonic, positioned on a contact-free inductive charging base. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Turtle Rock Scientific LLC |
Taille de l’image : | 4484 px × 6868 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |