It works. According to Dr. Youlai's inquiry. Com, remember that herbal medicine has a strong killing effect on a variety of bacteria, fungi and viruses, and can remove calcified or calcified plaques and soft scales deposited on the surface of teeth or restorations. It exists in the tooth surface at the opening of salivary gland, the lingual surface of mandibular anterior teeth, the buccal surface of maxillary posterior teeth and the neck of teeth, as well as the tooth surface where oral mucosa can not move. It exists on the surface of teeth at the opening of salivary gland. For example, the lingual surface of mandibular anterior teeth, the buccal surface of maxillary posterior teeth and the neck of teeth, as well as the tooth surface where oral mucosa can not move.