Teeth with grooves may have wedge-shaped injury, and long-term chronic irritation has to do with, can be filled to restore, root canal treatment and dental crown restoration or extraction. 1. Filling and restoration: generally go to the stomatology department of regular hospitals, or the endodontics department of large hospitals. The surface of the decayed and necrotic tissue or infected and softened dentin is removed with a dental drill or digging spoon, and then filled with composite resin. If the bottom of the defect is close to the pulp cavity, in order to avoid irritation to the pulp, it can be cushioned with calcium hydroxide and then filled with composite resin to restore the shape of the neck of the tooth. 2. Root canal treatment: If the defect has reached the pulp cavity, that is, after removing the decayed and necrotic tissues, the perforation of the pulp has been seen and the pulp has been infected, or even the formation of apical periapical inflammation, it is necessary to carry out root canal treatment. The tooth is drilled from the tooth surface to remove the infected, or necrotic, gangrenous pulp in the pulp cavity, and then root canal exchange, or direct root canal preparation, root canal flushing, root canal filling to control inflammation. 3. Crown restoration or extraction: If the tooth is found to have a loose crown, which will be fractured soon, root canal treatment can be carried out first to remove the crown that is about to be fractured, and then crown restoration can be carried out, and if it cannot be restored, extraction can be carried out. Patients should develop a correct way of brushing their teeth on a daily basis, and can rinse their mouths with warm boiled water after meals to be able to reduce food residues, and also eat less sweets to prevent caries, and if the teeth are bad, they should also eat less hard food to prevent the teeth from chipping or chipping.