This test identifies areas of dental plaque, which shows how thoroughly (or not) you are brushing and flossing your teeth.

Plaque is a sticky substance, composed of millions of bacteria, which collects around and between teeth. It is the major cause of tooth decay and gum disease (gingivitis). Plaque is hard to see because it is whitish colored, like teeth.

There are two ways to perform this test. One method uses special tablets that contain a red dye that stains the plaque. One tablet is chewed thoroughly, moving the mixture of saliva and dye over the teeth and gums for about 30 seconds. The mouth is then rinsed with water and the teeth are examined to identify pink-stained areas (unremoved plaque). A small dental mirror may help to check all areas.

The second method uses a plaque light. A special fluorescent solution is swirled around the mouth. The mouth is rinsed gently with water, and the teeth and gums are examined while shining an ultraviolet plaque light into the mouth. The advantage of this method is that it leaves no pink stains in the mouth.

In the office, dentists are often able to detect plaque through a thorough examination with dental instruments.

Brush and floss your teeth thoroughly.

Your mouth may feel slightly dried out after use of the dye.