Synergistic mechanism of Ag+–Zn2+ in anti-bacterial activity against Enterococcus faecalis and its application against dentin infection

Table 1 Antibacterial efficiency of Ag⁺–Zn²⁺ combinations based on CFU counting

Atomic ratio (Ag⁺–Zn²⁺)	AgNO₃ + Zn(NO₃)₂·6H₂O (× 10⁻² mg/mL)	Antibacterial efficiency (Median (P25–P75) [%])
1:1	1.6 + 2.8	67.19 (63.37–76.52)
1:3	1.6 + 8.4	108.29 (83.11–146.85)
1:6	1.6 + 16.8	150.71 (118.46–174.25)^a
1:9	1.6 + 25.2	162.28 (149.30–167.40)^a
1:12	1.6 + 33.6	160.05 (156.20–174.95)^a

Groups designated by same superscript are not significantly different (p > 0.05)

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