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10.1016/j.jdent.2020.103576 http://scihub22266oqcxt.onion/10.1016/j.jdent.2020.103576 33388387!7834919!33388387     free     free     free Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 263.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       J+Dent 2021 ; 105 (ä): 103576 Nephropedia Template TP {{tp|p=33388387|t=2021. Effects of mechanical ventilation and portable air cleaner on aerosol removal from dental treatment rooms |pdf=|usr=}}{{33388387}} gab.com Text Effects of mechanical ventilation and portable air cleaner on aerosol removal from dental treatment rooms JO: J Dent http://www.kidney.de/pget.php?&tw=1&pmid=33388387 #FOAvip OBJECTIVES: To evaluate the mechanical ventilation rates of dental treatment rooms and assess the effectiveness of aerosol removal by mechanical ventilation and a portable air cleaner (PAC) with a high-efficiency particulate air (HEPA) filter. METHODS: Volumetric airflow were measured to assess air change rate per hour by ventilation (ACH(vent)). Equivalent ventilation provided by the PAC (ACH(pac)) was calculated based on its clean air delivery rate. Concentrations of 0.3, 0.5 and 1.0 mum aerosol particles were measured in 10 dental treatment rooms with various ventilation rates at baseline, after 5-min of incense burn, and after 30-min of observation with and without the PAC or ventilation system in operation. Velocities of aerosol removal were assessed by concentration decay constants for the 0.3 mum particles with ventilation alone (K(n)) and with ventilation and PAC (K(n+pac)), and by times needed to reach 95 % and 100 % removal of accumulated aerosol particles. RESULTS: ACH(vent) varied from 3 to 45. K(n) and K(n+pac) were correlated with ACH(vent) (r = 0.90) and combined ACH(total) (r = 0.81), respectively. Accumulated aerosol particles could not be removed by ventilation alone within 30-min in rooms with ACH(vent)<15. PAC reduced aerosol accumulation and accelerated aerosol removal, and accumulated aerosols could be completely removed in 4 to 12-min by ventilation combined with PAC. Effectiveness of the PAC was especially prominent in rooms with poor ventilation. Added benefit of PAC in aerosol removal was inversely correlated with ACH(vent). CONCLUSIONS: Aerosol accumulation may occur in dental treatment rooms with poor ventilation. Addition of PAC with a HEPA filter significantly reduced aerosol accumulation and accelerated aerosol removal. CLINICAL SIGNIFICANCE: Addition of PAC with a HEPA filter improves aerosol removal in rooms with low ventilation rates. Twit Text FOAVip Effects of mechanical ventilation and portable air cleaner on aerosol removal from dental treatment rooms ????J Dent http://www.kidney.de/pget.php?&tw=1&pmid=33388387 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=33388387 #FOAvip English Wikipedia <ref>{{Cite pmid|33388387}}</ref> Effects of mechanical ventilation and portable air cleaner on aerosol removal from dental treatment rooms #MMPMID33388387 Ren YF; Huang Q; Marzouk T; Richard R; Pembroke K; Martone P; Venner T; Malmstrom H; Eliav E J Dent 2021[Feb]; 105 (ä): 103576 PMID33388387show ga OBJECTIVES: To evaluate the mechanical ventilation rates of dental treatment rooms and assess the effectiveness of aerosol removal by mechanical ventilation and a portable air cleaner (PAC) with a high-efficiency particulate air (HEPA) filter. METHODS: Volumetric airflow were measured to assess air change rate per hour by ventilation (ACH(vent)). Equivalent ventilation provided by the PAC (ACH(pac)) was calculated based on its clean air delivery rate. Concentrations of 0.3, 0.5 and 1.0 mum aerosol particles were measured in 10 dental treatment rooms with various ventilation rates at baseline, after 5-min of incense burn, and after 30-min of observation with and without the PAC or ventilation system in operation. Velocities of aerosol removal were assessed by concentration decay constants for the 0.3 mum particles with ventilation alone (K(n)) and with ventilation and PAC (K(n+pac)), and by times needed to reach 95 % and 100 % removal of accumulated aerosol particles. RESULTS: ACH(vent) varied from 3 to 45. K(n) and K(n+pac) were correlated with ACH(vent) (r = 0.90) and combined ACH(total) (r = 0.81), respectively. Accumulated aerosol particles could not be removed by ventilation alone within 30-min in rooms with ACH(vent)<15. PAC reduced aerosol accumulation and accelerated aerosol removal, and accumulated aerosols could be completely removed in 4 to 12-min by ventilation combined with PAC. Effectiveness of the PAC was especially prominent in rooms with poor ventilation. Added benefit of PAC in aerosol removal was inversely correlated with ACH(vent). CONCLUSIONS: Aerosol accumulation may occur in dental treatment rooms with poor ventilation. Addition of PAC with a HEPA filter significantly reduced aerosol accumulation and accelerated aerosol removal. CLINICAL SIGNIFICANCE: Addition of PAC with a HEPA filter improves aerosol removal in rooms with low ventilation rates. |*Respiration, Artificial[MESH] |*Ventilation[MESH] |Aerosols[MESH]Effects of mechanical ventilation and portable air cleaner on aerosol (epmc).pdf DeepDyve Pubget Overpricing