Clinical symptoms and imaging tests are used to determine whether a tooth root is broken. 1. Clinical symptoms: If the root of the tooth is broken, the patient will usually have a history of biting hard objects, and after biting hard objects, the tooth will not dare to exert force, and the gum area will be swollen periodically, and even lead to the loosening of the crown of the tooth. 2. Imaging examination: one of the more commonly used is to take X-rays, from the X-ray can directly see whether the root of the tooth transverse fracture or longitudinal fracture, but also may be due to caries caused by the root of the tooth is bad. Once the root of the tooth is broken, often irreversible, you need to go to the hospital stomatology department in a timely manner, with the doctor to take the relevant examination and treatment, usually pay attention to the protection of teeth.