Table 2.

Mean color differences and standard deviations of treatment groups between the application of the surface treatment and the subsequent readings.

Treatment option	N	∆E 1–2	∆E 1–3	p (t-Test)
Group A	8	4.4 ± 2.9	2.9 ± 1.7	0.24
Group B	8	8.3 ± 2.6	12.6 ± 3.8	0.02*
Group C	8	2.2 ± 1.3	2.7 ± 1.6	0.68

Ref. ∆E: Color difference—*significant differences.