. 2017 Dec 22;11(1):9. doi: 10.3390/ma11010009

Table 1.

Bacterial numbers in dentinal lesions (at baseline and after biofilm challenge) and bacterial reduction compared with baseline (before treatment).

Treatment	Bacterial Counts (CFU/μg)		Reduction
Treatment	(Baseline)	(After Biofilm-Challenge)	Reduction
Con	1721 (977/2671)	1451 (827/2645) ^a	−17% (−57/120%) ^a
NaF	1231 (458/5185)	750 (260/1401) ^ab	−8% (−96/178%) ^a
CHX	929 (417/3530)	190 (73/517) ^c	−87% (−98/−68%) ^b
SDF	1680 (625/4058)	360 (136/1166) ^bc	−75% (−95/8%) ^a

Samples were submitted to no treatment (Con), daily sodium fluoride (NaF) rinses only, chlorhexidine (CHX) or silver diamine fluoride (SDF) varnishes plus daily NaF rinses. Colony forming units per μg dentin (CFU/μg) and reductions (in percent compared with baseline) are reported as median (25th/75th percentiles). Different superscript letters indicate statistically significant differences between groups (p < 0.05, Mann–Whitney/Bonferroni) (for example, for reduction in CFU counts, CHX (subscript letter b) is significantly different than all other groups (subscript letter a)). n = 25/group.