Plaque is a sticky layer of material containing germs that accumulates on teeth, including places where toothbrushes can't reach. This can lead to gum disease. The best way to get rid of plaque is to brush and floss your teeth carefully every day. The toothbrush cleans the tops and sides of your teeth. Dental floss cleans in between them.
Some people use waterpiks, but floss is the best choice.
Floss removes plaque and debris that adhere to teeth and gums in between teeth, polishes tooth surfaces, and controls bad breath. Floss is the single most important weapon against plaque, perhaps more important than the toothbrush. Many people just don't spend enough time flossing or brushing and many have never been taught to floss or brush properly. When you visit your dentist or hygienist, ask to be shown. Wide floss, or dental tape, may be helpful for people with a lot of bridgework.