Fig. 4From: Concern about the risk of aerosol contamination from ultrasonic scaler: a systematic review and meta-analysisAnalysis 2 - Reduction in the level of aerosol contamination by comparing the use of high (HVE) and low (LVE) volume suction in randomized controlled trials. Secondary outcome: reduction in the level of contamination. Subtitle: SD: Standard deviation, CI: Confidence intervalBack to article page