Effectiveness of precooling with ethyl chloride versus honey in alleviating intra-oral injection pain in adult patients: A randomized controlled trial

OBJECTIVE: The objective of the study was to assess and compare the effectiveness of precooling with ethyl chloride versus honey in alleviating the pain of dental injection. METHODS: About 90 patients were recruited for this randomized controlled trial. In each of the following three groups, 30 patients were allocated: Group 1, precooling with ethyl chloride; Group 2, honey; and Group 3, control. The pain score of patients in each group was measured after injecting the dental local anesthesia using a visual analog scale. Paired t-test and multiple linear regression tests were used for statistical analysis. A p value of ⩽0.05 was considered to be as significant. RESULTS: The mean pain scores of participants residing in different groups were as follows: Group 1: 2.83 ± 1.46, Group 2: 4.33 ± 1.62, and Group 3: 7.80. After administrating ethyl chloride, the majority of the 18 (60%) patients reported to suffer from “mild pain.” Furthermore, in patients who were given honey in Group 2, most of the 21 (70%) patients reported suffering from “moderate pain.” In Group 3 (control) where no anesthetic modality was used, the majority of the 25 (83.33%) patients experienced “severe pain.” A significant difference was noted among the pain scores of three groups (p = 0.001). CONCLUSION: The administration of local anesthetic is part of almost all dental procedures. Precooling with ethyl chloride resulted in a greater reduction in pain scores than honey upon administration of local anesthesia injection.