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

Table 4 Mean and standard deviation of plaque pH with 95% confidence interval at baseline and at different time intervals

Time interval	Chitosan-based varnish (CHS)				Chlorhexidine-fluoride varnish (CFV)
	n (teeth)	Mean ± standard deviation	95% Confidence interval		n (teeth)	Mean ± standard deviation	95% Confidence interval
	n (teeth)	Mean ± standard deviation	Lower bound	Upper bound			Lower bound	Upper bound
PPHT0	40	6.3 ± 0.97	5.8	6.8	40	6.2 ± 0.61	6.0	6.5
PPHT1	40	6.2 ± 0.72	5.8	6.5	40	6.03 ± 0.84	5.6	6.4
PPHT2	40	6.2 ± 0.74	5.8	6.5	40	6.10 ± 0.56	5.9	6.3
PPHT3	40	6.1 ± 0.51	5.9	6.4	40	6.2 ± 0.56	6.0	6.5
PPHT4	40	6.1 ± 0.90	5.7	6.6	40	6.0 ± 0.59	5.7	6.2
PPHT5	40	6.2 ± 0.67	5.9	6.5	40	6.2 ± 0.46	6.0	6.4
PPHT6	40	6.4 ± 0.62	6.1	6.7	40	6.5 ± 0.42	6.3	6.7

ISSN: 1472-6831