Appendix 3 Surgical procedure description including procedure detail, operatory type, duration of procedure and scavenger variation. EOS = extraoral scavenging, HVS = high-volume suction, ES = saliva ejector, RD = rubber dam. Frequency (n) denotes the mean number of times sites within that procedure were contaminated and mean intensity (%) of contamination. Clinician and assistant sites are reported separately

Procedure	Code	Operatory type	Duration of procedure	Variation of procedure	Overall frequency of operatory site contamination (n)	Overall mean intensity operatory (%)	Maximum intensity operatory (%)	Maximum intensity operatory site name	Overall frequency of clinician contamination (n)	Overall mean intensity clinician (%)	Maximum intensity clinician (%)	Maximum intensity clinician site	Overall frequency of assistant contamination (n)	Overall mean intensity assistant (%)	Maximum intensity assistant (%)	Maximum intensity assistant site
Surgical sectioning of 37 and 38	G1	Closed	10 minutes	Surgical suction and SE	1	2.14	96.45	Patient	1	0.15	2.74	Chest	3	5.44	45.23	Chest
	G2			Surgical suction	1	1.3	58.71	Patient	1	1.36	24.52	Chest	4	7.30	71.07	Chest
	G3			EOS and surgical suction	1	1.66	74.7	Patient	2	0.28	4.10	Visor right	3	1.63	21.80	Chest
Surgical sectioning of 47 and 48	H1	Closed	10 minutes	Surgical suction and SE	1	2.01	90.24	Patient	2	0.09	1.13	Chest	5	3.51	53.13	Chest
	H2			Surgical suction only	1	0.77	34.71	Patient	2	0.08	1.13	Visor front	6	3.26	56.15	Chest
Implant osteotomy preparation of 36	I1	Closed	Sequential use of implant preparation drills 2.2 mm, 2.8 mm and 3.5 mm	Surgical suction	1	0.04	1.72	Patient	0	0.00	0.00	None	3	0.50	4.17	Visor front
Implant osteotomy preparation of 46	J1	Closed	Sequential use of implant preparation drills 2.2 mm, 2.8 mm and 3.5 mm	Surgical suction	0	0	0	None	1	0.04	0.64	Chest	2	0.08	0.91	Chest
	J2			Surgical suction and SE	1	2	90.15	Patient	0	0.00	0.00	None	4	2.77	46.55	Chest