Table 1.

Percentage mean difference in frequency and intensity of contamination between procedures with and without EOS. Results reported for operatory, clinician and assistant sites separately

Result for each site	Without EOS	With EOS	Difference	Reduction (%)
Mean frequency of operatory sites contaminated (n)	5	4	1	20%
Mean percentage intensity of operatory contamination	2.9	0.72	2.18	75%
Mean frequency of clinician sites contaminated (n)	4	4	0	0%
Mean percentage intensity of clinician contamination	0.81	0.54	0.27	33%
Mean frequency of assistant sites contaminated (n)	2	2	0	0%
Mean percentage intensity of assistant contamination	1.01	0.24	0.77	76%