The advantage of the flosser is that it can effectively clean the surface of the teeth, the gaps between the teeth, the gum gaps and the sulcus by using a high speed pulsating water column. Because the surface of teeth is not flat, using toothbrush can only clean the surface of teeth, but it is difficult to use toothbrush to clean the adjacent gaps, the gap between teeth and gums, and the inside of sulcus, which is easy to occur caries. Using a flosser can remove the residual plaque and food residue in the mouth more thoroughly than a toothbrush, keep the mouth clean and hygienic, and effectively remove oral odor. In addition, the water flow generated by the flosser can massage the gums to a certain extent and promote the blood circulation of the gums. The shortcoming of the flosser is that some scholars believe that the flosser will take away a large amount of saliva during the use of the flosser, and its high-speed water flow will also damage the oral mucosa and the balance of oral flora, affecting oral health. But as long as the use of moderate, will not cause too serious consequences, because the normal diet, brushing, will also take away a lot of saliva. However, if the flosser is used in an improper way, such as flushing deep in the throat causing trauma, or using a poor quality flosser, it can cause gum recession. To sum up, using a flosser can improve oral hygiene to a certain extent, reduce the production of plaque and remove oral odor. However, the flosser cannot replace the role of a toothbrush. The correct way to use the flosser is to brush your teeth in the morning and evening, and clean up with the flosser after meals.