Teeth that are black with caries can usually be treated with remineralization therapy, prophylactic resin filling therapy, and filling and restoration therapy. Dental caries is a chronic bacterial, progressive destructive lesion of the hard tissues of the teeth. Patients may experience symptoms such as toothache, tooth sensitivity, and oral odor. The treatment of dental caries is mainly to terminate its progression and repair the form and function of the teeth. 1. Remineralization treatment is mainly applicable to early caries, which is to achieve remineralization of the teeth through medication so that they will not continue to decay. 2. Prophylactic resin filling is applied to teeth suspected of caries or with a tendency to caries, to prevent caries from continuing to develop through prophylactic treatment. 3. Restorative filling treatment is suitable for patients who have already caused hard tissue defects and formed cavities, and the restorative materials are used to fill the tissue defects and restore the teeth through surgical methods. It is recommended that the patient should consult the doctor in time and choose the appropriate treatment method under the doctor’s guidance.