Occlusal ANOVA Range Mean ± SD F P-value Group I 0.000 - 2.000 0.300 ± 0.571 1.141 0.338 Group II 0.000 - 3.000 0.550 ± 0.826 Group III 0.000 - 2.000 0.500 ± 0.607 Group IV 0.000 - 2.000 0.700 ± 0.733

Table 3: Mean of dye Penetration Scores and standard deviations for the tested materials at the occlusal (enamel) walls.