Polishing the tooth before filling is painful can be done after removing the decayed material and then filling with calcium hydroxide, or zinc oxide to pacify, observe 1~2 weeks after filling. Polishing the tooth before filling is in the process of decay removal, in the process of decay removal gradually close to the pulp, there will be a gradual pain. If the decay is not removed and the pulp is exposed, root canal treatment should be chosen. After removing the decayed material, the pulp is not obvious, you can choose to fill the tooth directly after cushioning, and if the pulp is obvious, you should choose to fill the tooth after 1~2 weeks of appeasement. When caries treatment, deep caries is more serious, closer to the pulp cavity, in the treatment should pay attention to the location of the pulp cavity, to avoid accidental penetration of the pulp, filling with pain can choose calcium hydroxide cushioning, to relieve the symptoms, calcium hydroxide can promote the deposition of calcium salts, there is a certain degree of anti-bacterial and anti-inflammatory properties, the pulp of the irritation is small, the cushioning and then fill with other materials. When filling the pulp symptoms are more serious, should choose zinc oxide cushion to pacify 1~2 weeks, zinc oxide has pain relief, pacify and mild antiseptic effect, can promote the formation of restorative dentin. 1~2 weeks after the symptoms are reduced or improved, you can carry on the formal filling. The usual daily routine to pay attention to oral cleaning and hygiene, can prevent and reduce the production of dental caries.