ALEX BARTEL / SCIENCE PHOTO LIBRARY ALEX BARTEL / SCIENCE PHOTO LIBRARY
Plaque detection. Teenager's teeth after chewing on a tablet to disclose the location of plaque (blue). Plaque is a mixture of food, saliva and bacteria on the teeth that can lead to tooth decay and gum disease. The blue areas show which parts are being missed during toothbrushing.
Model release not required. Property release not required.