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34.7 MB (1.6 MB compressed)
4368 x 2780 pixels
37.1 x 23.6 cm ⏐ 14.6 x 9.3 in (300dpi)
ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY
Electric toothbrush heads. Electric toothbrushes have a motor which vibrates the brush head, helping to clean teeth thoroughly. Brushing teeth removes accumulated food and bacterial plaque, helping to prevent tooth decay and gum disease.
Model release not required. Property release not required.