How to use dental floss correctly

When cleaning the posterior teeth area, use the index fingers of both hands instead, and straighten the fingers to reach the gap between the posterior teeth. The left and right adjacent surfaces of the upper and lower scraping gaps. Most people only use dental floss to remove food residues, but do not implement the action of "scraping" the surface of the teeth. The invisible plaque still accumulates between the teeth, and the cleaning effect is greatly reduced.