Brushing 3 times a day is an important measure to effectively maintain oral hygiene, it is generally recommended to brush your teeth in the morning and evening, you can also add 1 brush after lunch. Each time you brush your teeth to achieve the effect, you must achieve enough brushing time and strength, master the correct brushing method, the main cleaning area in the gum and tooth surface junction position, this place is more likely to breed plaque and lead to gingivitis or periodontitis place. Therefore, good brushing habits are the main method to remove plaque and the main clinical measure to prevent gingivitis, and flossing can also be used to clean the adjacent surfaces of the teeth so that oral hygiene can be maintained in a comprehensive manner.