Pulpitis kills the nerve to have some effect on the tooth, making the tissue brittle and may cause the tooth to splinter. Dental nerve has the function of feeling and nutrient dentin, is to give the teeth to improve the nutrition of the tissue, if the pulpitis kills the nerve will cause the teeth to feel insensitive to things, at the same time, the dentin has lost the nutrient supply of the pulp tissue, if the dental defect is relatively large, dentin resistance to reduce the teeth become easy to brittle, eat hard things may cause the teeth to splinter. After killing the nerve of pulpitis, it is recommended to carry out crown restoration in a timely manner to protect the tooth from splintering. Therefore, pulpitis kills the nerve will lead to the tooth is not sensitive to food, the tooth is easy to brittle and easy to crack, it is recommended to carry out crown restoration in time to protect the tooth.