Dental floss is a cord of thin filaments used to remove food and dental plaque from between teeth. The floss is gently inserted between the teeth and wiped along the teeth sides, especially close to the gums or underneath them.
Toothbrushes do not clean between teeth or below the gumline. Used as an addition to toothbrushing as part of regular oral hygiene flossing can reduce gingivitis and halitosis compared to toothbrushing alone. In dentistry, floss is classed as an interdental (between teeth) cleaning aid.