000K utf8 1100 $c2022 1500 eng 2050 urn:nbn:de:gbv:8:3-2024-00334-3 2051 10.1007/s00784-022-04525-7 3000 Graetz, Christian 3010 Cyris, Miriam 3010 Dörfer, Christof Edmund 3010 Düffert, Paulina 3010 Geiken, Antje 3010 Hülsbeck, Viktor 3010 Schorr, Susanne 3010 Straßburger, Martin 4000 Influence of flow rate and different size of suction cannulas on splatter contamination in dentistry: results of an exploratory study with a high-volume evacuation system$hSpringer Science and Business Media LLC [Graetz, Christian] 4030 $nSpringer Science and Business Media LLC 4209 Objectives SOPs recommend high-volume evacuation (HVE) for aerosol-generating procedures (AGPs) in dentistry. Therefore, in the exploratory study, the area of splatter contamination (SCON in %) generated by high-speed tooth preparation (HSP) and air-polishing (APD) was measured when different suction cannulas of 6 mm diameter (saliva ejector (SAE)), 11 mm (HC11), or 16 mm (HC16) were utilized versus no-suction (NS). Materials and methods Eighty tests were performed in a closed darkened room to measure SCON (1m circular around the manikin head (3.14 m2) via plan metrically assessment through fluorescence technique. HSP (handpiece, turbine (Kavo, Germany)) or APD (LM-ProPowerTM (Finland), Airflow®-Prophylaxis-Master (Switzerland)) for 6 min plus 5 s post-treatment were performed either without suction or with low-flow (150 l/min for SAE) or high-flow rate (250 l/min/350 l/min for HC11/HC16) suction. All tests were two-tailed (p≤0.05, Bonferroni corrected for multi-testing). Results Irrespective the AGP, SCON was higher for NS (median [25th; 75th percentiles]: 3.4% [2.6; 5.4]) versus high-flow suction (1.9% [1.5; 2.5]) (p=0.002). Low-flow suction (3.5% [2.6; 4.3]) versus NS resulted in slightly lower but not statistically significantly lower SCON (p=1.000) and was less effective than high-flow suction (p=0.003). Lowest contamination values were found with HC16 (1.9% [1.5; 2.5]; p≤0.002), whereat no significant differences were found for HC11 (2.4% [1.7; 3.1]) compared to SAE (p=0.385) or NS (p=0.316). Conclusions Within study's limitations, the lowest splatter contamination values resulted when HC16 were utilized by a high-flow rate of ≥250 l/min. Clinical relevance It is strongly recommended to utilize an HVE with suction cannulas of 16mm diameter for a high-flow rate during all AGPs and afterwards also to disinfect all surface of patients or operators contacted. 4950 https://doi.org/10.1007/s00784-022-04525-7$xR$3Volltext$534 4950 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2024-00334-3$xR$3Volltext$534 4961 https://macau.uni-kiel.de/receive/macau_mods_00004616 5051 610 5550 Aerosols 5550 Air-polishing 5550 Cannula 5550 Dentistry 5550 Experimental Setup 5550 Finland 5550 Humans 5550 Sars-cov2 5550 Splatter Contamination 5550 Suction 5550 Suction System 5550 Tooth Preparation 5550 Tooth Preparation