Table 4. Impedance parameters obtained for the two alloys immersed in the AS solutions with and without S. mutans species.

Alloy	Medium	Rs (Ω)	Q1 (CPE)		R1 (kΩ)	Q2 (CPE)		R2(Ω)
			Yo1(Ω-1 cm-2 sn)	n1		Yo2(Ω-1 cm-2 sn)	n2
CoCr	Without S. mutans	37.9± 10.35	3.25±0.57 (×10−5)	0.891±0.025	5483± 1320	–	–	–
CoCr	With S. mutans	31.99±2.46	0.52±0.14 (×10−5)	0.973±0.025	7443± 2459	2.46±0.58 (×10−5)	0.923±0.011	4411± 2169
NiCr	Without S. mutans	66.23±40.50	5.37±0.74 (×10−5)	0.854±0.015	2537± 326	–	–	–
NiCr	With S. mutans	21.16±6.08	1.01±0.47 (×10−5)	0.970±0.030	2710± 570	2.88±0.90 (×10−5)	0.915±0.015	2440± 1234