Biofilm formation following chitosan-based varnish or chlorhexidine-fluoride varnish application in patients undergoing fixed orthodontic treatment: a double blinded randomised controlled trial

Table 3 Mean and standard deviation of plaque bacterial count at baseline and different time intervals

Time interval	Chitosan-based varnish (CHS)			Chlorhexidine-fluoride varnish (CFV)
Time interval	n (teeth)	Mean ± standard deviation (× 10⁴)	Median (× 10⁴)	n (teeth)	Mean ± standard deviation (× 10⁴)	Median (× 10⁴)
BCT0	40	3.6 ± 3.9	2.3	40	4.4 ± 3.8	4.5
BCT1	40	1.6 ± 1.3	1.5	40	2.2 ± 2.1	1.0
BCT2	40	1.1 ± 1.0	1.0	40	1.2 ± 1.5	0.75
BCT3	40	0.88 ± 1.0	1.0	40	2.4 ± 2.9	1.0
BCT4	40	1.3 ± 0.55	0.55	40	1.5 ± 1.7	1.0
BCT5*	40	0.44 ± 0.1	0.1	40	0.88 ± 0.77	0.75
BCT6*	40	0.43 ± 0.4	0.4	40	0.77 ± 0.64	0.6