For those who have only the root of the tooth left, root canal treatment and veneers can be used depending on the actual condition of the tooth. 1. For most of the patients with only roots left, the local condition can be improved by root canal treatment, which is suitable for patients whose roots can still be retained for use. In other words, the root canals will be enlarged by removing the decayed dentin, and then filled with specialized materials and restored with crowns to achieve the purpose of restoration. 2. In addition to the above treatments, some of those who have only the root of the tooth left are required to seek medical treatment to have the root of the tooth extracted, and then consider veneering in order to ensure the normal function of the tooth and improve the quality of life. Usually, people can choose porcelain teeth, removable dentures, dental implants, etc. according to their own conditions. It is recommended that those who have only the root of the tooth left should go to the doctor for a detailed examination, so as to clarify the condition of the tooth and choose a suitable treatment plan after combining their own conditions. Enhance the oral care in daily life, brush and rinse your teeth after meals to prevent infection.