Table 1 Comparison of particle concentrations under drilling the teeth without/with suction conditions
From: Effect of forceful suction and air disinfection machines on aerosol removal
|  | Without suction (n = 50) | With suction (n = 50) | P value | |
|---|---|---|---|---|
Volume ft3(m3) | 956.69(63.25) | 597(42.18) | 0.025 | |
ACH | 16.25 ± 1.59 | 8.62 ± 2.06 | < 0.001 | |
Temp(℃) | 24.61 ± 3.62 | 20.62 ± 1.89 | 0.562 | |
RH(%) | 44.28 ± 2.61 | 41.25 ± 3.69 | 0.251 | |
Number concentration, particles/m3 | PM ≥ 0.5 | 1.88*107(1.06*107-2.65*107) | 8.88*106(5.6*106-9.95*106) | 0.011 |
PM10 | 1.52*105(1.22*105-1.71*106) | 8.39*104(2.6*104-8.5*104) | 0.035 | |
PM2.5 | 1.06*105(1.84*104-6.65*105) | 8.01*104(3.8*104-9.2*104) | 0.011 | |
PM1 | 1.38*105(0.76*105-1.77*105) | 7.58*104(4.9*104-1.02*105) | < 0.001 | |
Mass concentration, µg/m3 | PM ≥ 0.5 | 135.66(72.61-196.25) | 69.25(43.61–99.25) | < 0.001 |
PM10 | 81.05(60.22-102.28) | 29.68(10.02–45.62) | < 0.001 | |
PM2.5 | 19.05(11.06–29.36) | 9.05(2.98–11.25) | 0.002 | |
PM1 | 6.00(2.61–9.05) | 2.66(0.99–3.98) | < 0.001 | |