BASS brushing method: Also known as the horizontal chattering method, it is an effective method of brushing to remove plaque near the gingival margin and in the gingival sulcus. Since the BASS method can remove plaque near the gingival margin and in the gingival sulcus, it is especially helpful in removing plaque from the inter-adjacent area, the cervical area and the exposed root surface of the teeth, so it is most important for maintaining gum and periodontal health. Brushing essentials (a) brushing method 1, brush the cervical gingival margin (1) hold the brush handle, place the brush head on the cervical part of the teeth, the bristles are at an angle of 45° with the long axis of the teeth, the bristles point to the root direction (maxillary teeth up, mandibular teeth down), apply slight pressure so that the bristles partially enter the gingival sulcus and partially place on the gingival margin. (2) In a group of 2 to 3 teeth, shake the toothbrush horizontally for 4 to 6 times at a short distance (about 2 mm). Then turn the toothbrush toward the crown and brush the labial and lingual (palatal) surfaces. Be careful to move gently. (3) Move the toothbrush to the next group of 2 to 3 teeth and reposition it, paying attention to the placement to overlap the position of 1 to 2 teeth. (4) When brushing the lingual (palatal) surface of the upper front teeth, place the brush head vertically on the tooth surface, make the front bristles contact the gingival margin or enter the gingival sulcus, make an up-and-down pulling tremor, brush from top to bottom, and do not brush back and forth. When brushing the lingual surface of the lower front teeth, brush from the bottom up. 2.Brush the buccolingual (palatal) surface Use the brushing method, ask in steps (2) and (3) to keep the brushing action consistent, and brush each part of the labial and lingual (palatal) surfaces of the maxillary and mandibular arches in order, without missing. 3, brush the occlusal surface Hold the brush handle, point the bristles to the occlusal surface and brush back and forth with slight force, paying attention to the upper and lower left and right segments. (B) Brushing time In order to ensure that each tooth surface has enough brushing time, brush for not less than 1 minute each time. (C) Brushing times In order to control plaque and maintain oral hygiene and fresh breath, brush your teeth at least 2 times a day in the morning and evening. Caution 1, brush the cervical gingival margin with appropriate force, do not use too much force to avoid gum damage. 2, the short distance of the horizontal quivering toothbrush distance can not be too long, control at about 2mm, too long will damage the cervical dental hard tissue. 3, brush the teeth in a certain order to ensure that each part and each tooth surface is brushed and not missed.