Abstract: Objective To compare the painless effects of Antipulp and Primacaine in treating root canal. Methods Molars (6-7) 280 cases of caries pulpitis were randomly divided into two groups, One group patients in the experiment group were given Antipulp, and patients in the other group were given Primacaine. The painless effects examined with the VAS scale method in treating root canal t were compared. Results For the treatment of maxillary molar, the painless excellent rate in Antipulp group was 80.8%, the excellent rate in Primacaine group was 88.2%. For the treatment of mandibular molar, the painless excellent rate in Antipulp group was 83.3%, the excellent rate in Primacaine group was 69.4%. Conclusion During the root canal treatment for mandibular Pulpitis, the treating effects byusing Antipulp are better than that of using Primacaine.

Key words: Antipulp, Primacaine, root canal treatment, pain