A broken tooth with only the root left should be treated according to the severity of the condition. In general, asymptomatic people can continue to observe, if there is pain and other symptoms, it is recommended that the root of the tooth be extracted in a timely manner. Breast teeth broken mostly due to dental caries, if there is no obvious inflammation or swelling, pain, you can continue to observe, so that the roots of the milk teeth to maintain the gap between the teeth, to induce the eruption of permanent teeth, to be permanent teeth eruption of about 2 / 3 and then timely extraction of milk teeth stumps. If the gums appear red, swollen, painful and other inflammatory conditions, the roots can break through the bed of the teeth to stab the mucosa, it is recommended to extract the roots in time and make a gap retainer. The specific situation also needs to be examined by a professional doctor to make a comprehensive judgment decision. It is recommended to go to a specialized hospital in time after a broken tooth with only the root left, and standardize the treatment under the guidance of the doctor.