@Article{macau_mods_00004616, author = {Graetz, Christian and H{\"u}lsbeck, Viktor and D{\"u}ffert, Paulina and Schorr, Susanne and Stra{\ss}burger, Martin and Geiken, Antje and D{\"o}rfer, Christof Edmund and Cyris, Miriam}, title = {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}, journal = {Clinical oral investigations}, year = {2022}, publisher = {Springer Science and Business Media LLC}, address = {Berlin; Heidelberg}, volume = {26}, number = {9}, pages = {5687--5696}, keywords = {Humans; Aerosols; Suction; Dentistry; Tooth Preparation; Finland; Cannula; Air-polishing; Experimental Setup; Suction System; Splatter Contamination; Sars-cov2}, abstract = {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.}, issn = {1432-6981}, doi = {10.1007/s00784-022-04525-7}, url = {https://macau.uni-kiel.de/receive/macau_mods_00004616}, url = {https://doi.org/10.1007/s00784-022-04525-7}, url = {http://www.ncbi.nlm.nih.gov/pubmed/35536440}, file = {:https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00005899/s00784-022-04525-7.pdf:PDF}, language = {de} }