Interdental floss helps remove debris and interproximal dental plaque, the plaque that collects between two teeth; dental floss and other interdental cleaners help clean these hard-to-reach tooth surfaces and reduce the likelihood of gum disease and tooth decay. By using a floss between teeth, effectively for places a toothbrush has difficulty reaching or is unable to reach. Regular using as part of oral cleansing is designed to maintain good dental health.