Dental floss is either a bundle of thin nylon filaments or a plastic ribbon used to remove food and dental plaque. Debris accumulates between the teeth. If not removed, bacteria will develop and plaque will form.The floss is gently inserted between the teeth and scraped along the teeth sides, especially close to the gums. Use the floss with a back and forth motion and with a vertical action until all the plaque is removed. Work the floss gently under the gum. Dental floss may be flavored or unflavored, and waxed or unwaxed. Flossing in combination with toothbrushing can prevent gum disease, bad breath, and dental caries.