The horizontal chattering brushing method is an effective method of brushing to remove plaque from the gingival sulcus. This method of brushing can help remove plaque from each tooth surface and effectively remove plaque from the cervical part of the teeth and the gingival sulcus. The specific operation is: ① hold the toothbrush handle, first place the brush head in the mouth on one side of the back teeth neck, the bristles and the tooth long axis is about 45 ° angle, the bristles point to the root direction (maxillary teeth up, mandibular teeth down), slight pressure, so that the bristles partly into the gum sulcus, partly placed on the gums; ② to 2 ~ 3 teeth as a group to start brushing, with a short distance horizontal chattering round trip action in the same part Brush at least 10 times, then turn the toothbrush toward the crown and continue brushing the labial (cheek) and lingual (palatal) surfaces of the teeth; ③After brushing the first part, move the toothbrush to the next group of 2~3 teeth and reposition it, taking care to maintain an overlapping area with the first part, and continue brushing the next part; ④When brushing the lingual surface of the upper front teeth, place the brush head vertically on the tooth surface so that the anterior bristles touch the gingival margin. Brush from top to bottom. When brushing the lingual surface of the lower anterior teeth, brush from the bottom up; ⑤ When brushing the occlusal surface, point the bristles at the occlusal surface and brush back and forth for a short distance with slight force.