Plaque on teeth is the main cause of gingivitis and periodontitis. Brushing can effectively remove plaque, maintain oral hygiene and prevent dental diseases. However, in life, there are still a few people who do not have the habit of brushing their teeth, and most of them do not know the correct method of brushing, which makes it difficult to achieve the purpose of dental care. Here are a few common brushing methods and the number and time of brushing. 1, the method of brushing teeth Horizontal chattering method: also called Bass brushing method. Horizontal trembling method with short trembling horizontal brushing action can clean plaque, so also known as the “groove brushing method”. Place the tip of the bristles at an angle of 45 degrees to the gingival surface of the teeth and light pressure, the tip of the bristles partly into the gingival sulcus, and partly outside the sulcus, and then for backward and forward trembling 6-8 times, trembling when the bristles move only 1mm. At the same time should also pull brush the posterior teeth occlusal surface, clean the sulcus point gap of the dental surface. Rotational brushing method: also called Roll brushing or vertical brushing method. Brush bristles and tooth surface at an angle of 45 degrees brush bristle head pointing to the gum, and gum gently contact, and then turn toward the crown, the speed is not too fast, so repeat 8-10 times, gradually in each tooth lip (cheek) surface and tongue surface movement. When brushing the occlusal surface, the bristles are placed on the occlusal surface and moved back and forth. This method has the effect of massaging the gums, improving local blood circulation and promoting epithelial keratinization, which helps to enhance the defense ability of periodontal tissues. Physiological brushing method: Brush the bristles in contact with the crown, point the bristle head to the crown and brush lightly along the gum side of the tooth. Brush each surface of each tooth in turn. This method can not only clean the tooth surface, but also massage the gums. 2, the number and time of brushing teeth must be brushed and rinsed in the morning and evening. If you have the conditions, you should brush your teeth immediately after each meal, and if you do not have the conditions, you should at least rinse your mouth with water. Each brush time is not less than 3 minutes. Not brushing your teeth before going to bed for a long time may cause tooth decay. Therefore, it is important to brush your teeth before going to bed and not to eat anything after brushing to maintain the oral hygiene overnight. 3.Toothbrush selection – maintenance – replacement You should choose a health care toothbrush, characterized by soft bristles, flat brush surface, small brush head, and rounded bristle tips, which can effectively eliminate plaque without damaging teeth and gums. Toothbrush handle and bristles are best vertical or nearly vertical shape is better. The tips of the bristles should be rounded to avoid hurting the gums. After each brushing, the toothbrush should be washed and placed in a cup with the brush head facing upwards in a ventilated and dry place. Every 1-3 months should be replaced with a new toothbrush, if you find that the bristles are scattered and bent, tilt should be replaced in a timely manner. 4, the choice of toothpaste should choose non-abrasive, non-abrasive teeth; can prevent a variety of oral diseases and prevention of oral bacteria breeding and plaque generation. Here to remind people who love acne skin do not choose fluoride toothpaste, you can choose some herbal, salt toothpaste, while encountering ulcers in the mouth, heavy breath people can also commonly use light salt water rinse mouth, so as to make the oral cleanliness lasting. Oral health is an important part of human health. The World Health Organization has pointed out that dental health refers to the teeth, periodontal tissues, adjacent parts of the mouth and jaws and face are free of tissue structure and function abnormalities. And the standard of oral health is formulated as follows: clean teeth, no cavities, no painful sensation, normal color of gums and no bleeding phenomenon. Therefore, good oral hygiene, sound oral function and no oral diseases are also a guarantee of a happy life.