The danger of exposed tooth roots is mainly a manifestation caused by gum recession, but the exposed tooth roots will be accompanied by symptoms such as enlarged gaps, loose teeth, and elongated teeth, etc. Because the gum recession makes the root surface lose gum protection, resulting in the exposure of tooth roots in the mouth, so the affected teeth will be allergic to excessively cold, hot stimuli, as well as acidic and sweet stimuli, and these long-term hot and cold These long-term hot and cold stimuli can cause inflammation of the tooth nerve, resulting in nerve pain, nerve necrosis, root canal calcification and even periapical inflammation. The enlarged gap will cause food embedding, embedding food if not removed in time, and will cause repeated inflammation of the gums, aggravate the periodontal bone resorption and gum recession and other problems, and will cause the occurrence of tooth root decay, serious root exposure can also cause more resorption of dental bone or cause the teeth to loosen and fall off, and then the teeth will have chewing soreness and weakness when eating, affecting the chewing function, which will aggravate the gastrointestinal burden, affecting If the root exposure occurs in the front teeth, it will also affect the aesthetics and cause psychological burden to the patient, which often prevents him/her from putting on a beautiful and confident smile.