Efficacy of Corticosteroids on Postoperative Endodontic Pain: A Systematic Review and Meta-analysis.

INTRODUCTION: The purpose of this systematic review and meta-analysis was to evaluate the effectiveness of corticosteroids on postoperative endodontic pain and to determine/adjust between-trial heterogeneity using meta-regression analysis. METHODS: A systematic literature search was conducted to identify randomized clinical trials using corticosteroids to manage postoperative endodontic pain in adults. The outcome measure was pain intensity scores at 6, 12, and 24 hours postoperatively. Standardized mean differences (SMDs) with their 95% confidence intervals (CIs) were estimated using the random effect inverse variance method. The level of significance was set at P < .05. Meta-regression analysis was also performed to examine the associations between effect sizes and study-level covariates. RESULTS: Eighteen randomized clinical trials, comprising 1088 patients, were included. Corticosteroids significantly reduced the incidence of postoperative pain in endodontic patients at 6 hours (SMD = -1.03; 95% CI, -1.55 to -0.51; P = .000), 12 hours (SMD = -1.089; 95% CI, -1.71 to -0.46; P = .001), and 24 hours (SMD = -0.957; 95% CI, -1.34 to -0.56; P = .000). Meta-regression analysis showed that the type and dose of drug, performing intention-to-treat analysis, and using rescue medication could significantly influence the effect size at different time points. CONCLUSIONS: Corticosteroids had a postoperative pain-reducing effect in endodontic patients, and the choice of drug regimens could be an important predictor of pain reduction.