Background: The purpose of this study was to investigate the effect of educational videos on reducing anxiety and fear in adult patients undergoing root canal therapy in private dental.

Materials and Methods: The research method was a quasi-experimental and pretest-posttest with a control group. The statistical population consisted of all patients referring to tooth dentists in private dental clinics of Shiraz during the summer of 1396. A sample of 50 people was selected through the convenience sampling method and randomly assigned into two experimental and control groups. Both groups responded to two anxiety and fear questionnaires. Then the experimental group participated in the training sessions and the control group did not attend this training period. Again, both questionnaires were administered to the two groups. The data obtained from completing the questionnaires were analyzed using a one-way analysis of covariance.

Results: The results of covariance analysis showed that there was a significant difference between the mean scores of the groups in the anxiety so that the mean of anxiety scores in the post-test in the experimental group was significantly lower than the control group. Also, there was a significant difference between the mean scores of the groups in the fear and its component (Avoiding dental treatment, Physical symptoms caused by anxiety and anxiety caused by dental stimuli), so that the mean of fear scores and its component in the post-test in the experimental group was significantly lower than the control group.

Conclusions: Based on the findings of this study, it can be concluded that educational videos play an important role in the reduction of anxiety and fear in the treatment of tooth decay in adult patients.