Table 2.

Distribution of aerosol fractions concentration (µg/m³) recorded while the dental unit door was open. A statistically significant difference was shown between the amounts of PM produced in the two conditions.

Parameter	Real Time Monitor		p-Value a
	Dental Unit Door Closed Mean ± SE (µg/m3)	Dental Unit Door Open Mean ± SE (µg/m3)
PM1	34.49 ± 0.72	45.98 ± 0.1	<0.001 *
PM2.5	35.34 ± 0.76	47.15 ± 0.12	<0.001 *
BREATHABLE DUST	37.1 ± 0.86	50.34 ± 0.14	<0.001 *
PM10	44.66 ± 1.45	64.32 ± 0.09	<0.001 *
TOTAL DUST	53.95 ± 2.29	82.37 ± 0.12	<0.001 *

^a Student’s t-test, * p < 0.001.