Dental radiographs may cause some radiation to the thyroid gland, but the amount of radiation is not significant. Dental radiographs are often an important way of checking for oral disease, to determine the extent and degree of the lesion, and can also be used to guide treatment. Since the thyroid gland is close to the mouth, it may be irradiated during the dental radiograph, so there will be some radiation to the thyroid gland from the dental radiograph. However, the amount of radiation from dental film is small, and if the dental film examination is conducted in a regular hospital, the doctor will also give the patient thyroid protection, the protection can cover the thyroid gland to avoid X-ray irradiation to the thyroid gland, so occasional dental film examination will not cause significant effects on the thyroid gland. Patients who need dental radiographs should do so under the direction of their doctor and take protective measures.