Objectives: To compare the possible benefits of the combination of dexamethasone-bupivacaine with articaine-epinephrine as an anaesthetic block after third molar surgery. Materials and Methods: Triple-blind, randomized, controlled, parallel, phase 3 clinical trial. Two groups: experimental (93 patients) with standard anaesthetic block: 40/0.005 mg/mL articaine-epinephrine and submucosal reinforcement with 0.8 mg dexamethasone-5% bupivacaine; and control group (91 patients) with standard block: 40/0.005 mg/mL articaine-epinephrine. The surgery consisted of the extraction of the impacted mandibular third molar by performing a procedure following the same repeatable scheme. The visual analogue scale (VAS) was used to analyse postoperative pain. Results: Groups were homogeneous, without significant differences related to epidemiological variables. Postoperative pain among the first, second, and seventh postoperative days was statistically significantly lower in the experimental group compared to the control group (p < 0.001). Drug consumption was lower in the experimental group throughout the study period (p < 0.04). Conclusion: Bupivacaine is an alternative to articaine in oral surgery, being more effective in reducing postoperative pain by reducing patients' scores on the VAS as well as their consumption of analgesic drugs after surgery.
Keywords: bupivacaine; dexamethasone; postoperative pain; submucosa; third molar surgery.