Document Type : Original Articles

Abstract

Introduction: Decreasing injection pain will make the patient more comfortable during dental procedures, giving a positive feeling towards dentistry. The most recently developed product for topical anesthesia is Denti Patch. The aim of this study was to evaluate the effectiveness of Denti Patch as a topical anesthetic agent before palatal infiltration injection. Materials and Methods: For this randomized double-blind clinical trial, fifty-four 9-12 year-old subjects, (23 boys and 31 girls) were selected. Before the study, Visual Analogue Scale (VAS) was explained to the participants. The injection area was dried by air spray for 5 seconds; then both patches, the placebo and lidocaine, were placed 5-10 mm from the free gingival margin of the palate on the injection site for 12 minutes. A total of 0.2 mL of 2% lidocaine was injected. After 1-2 minutes the second injection was made on the contra-lateral side. Data was analyzed by paired t-test and Willcoxon test comparing VAS and CPS scales (α = 0.05). Results: Means from Childrens hospital of eastern Ontario Pain Scale (CPS) test in the non-anxious children for placebo and Denti Patch were 8.5 and 8.4, respectively, with no significant differences (p value = 0.88). The results from VAS test in non-anxious children for placebo and Denti Patch were 75.2 and the 70.2, respectively, demonstrating a statistically significant difference (p value = 0.006). Conclusion: According to this study, Denti Patch is effective in reducing the pain of palatal infiltration injection. The differences between CPS and VAS test results might be attributed to the cooperation of subjects, their friendly relationship with the dentist, and their abstinence from exhibiting false alarm reactions in the CPS test.   Key words: Anesthesia, Denti Patch, Pain, Palate.