From:  Effectiveness of anti-inflammatory premedication on inferior alveolar nerve block success in acute irreversible pulpitis: a systematic review

 GRADE summary table—certainty of evidence.

OutcomeNo. of studies (RCTs)Risk of biasInconsistencyIndirectnessImprecisionPublication biasOverall certainty
IANB success rate (NSAIDs vs. Placebo)13+-+---
IANB success rate (Corticosteroids vs. Placebo)6+++---
IANB success (NSAIDs vs. Corticosteroids)4+×+×-+
Postoperative pain reduction5+++-+-

Red ×: high; yellow -: some concerns; green +: low. RCTs: randomized controlled trials; IANB: inferior alveolar nerve block; NSAIDs: non-steroidal anti-inflammatory drugs.