The pulpitis is not treated, it will gradually develop into periapicalitis, if the periapicalitis in the acute attack, there may be systemic symptoms, and further development, there may be apical cysts and the final tooth can not be saved, may need denture repair. The main reason for this is that the residual pulp is not removed during the treatment process, and it is recommended to go to a regular dental hospital for treatment. The reason is that the regular dental hospitals will use a microscope and operate under the microscope, so there is rarely a case of residual pulpitis.