When you want to know the extent of dental caries through dental radiographs, you can identify the caries based on the depth of caries observed, and you can also analyze whether there is any enamel damage. By taking dental radiographs, it is possible to observe the formation of holes in the teeth, also known as cavities, and then recognize the severity of caries based on the depth. It is also possible to analyze whether the enamel has been damaged based on the radiographs. If the enamel and dentin have been damaged, it is usually considered to be more serious caries. In more serious caries, the color of the tooth is dark brown or black from the surface, and there are cavities formed. The patient will often feel toothache and be sensitive to cold, heat, acid, and sweet, causing an irritating reaction once eating. Some patients with severe caries may affect the surrounding teeth and easily cause tooth loosening. If the dental radiographs show that the caries is serious, it is recommended to do root canal treatment as soon as possible. Usually also need to pay attention to oral hygiene, and regular brushing, and prohibit eating sugary foods before going to bed at night.