Table 7. Mean, standard deviation among study groups for surface translucency.
| Study groups | Stained-water | Stained-acid | Polished-water | Polished-acid | P value$ |
|---|---|---|---|---|---|
| VM | 1.120 (0.41) | 1.07 (.200) | 11.52 (0.45)* | 11.009 (0.41)* | < .01 |
| LU | 8.4 (1.76) | 9.5 (1.11)* | 11.02 (0.99)* | 10.05 (1.021)* | < .01 |
| EN | 7.09 (1.45) | 6.5 (0.55) | 10.1 (0.43)* | 9.91 (0.37) | < .01 |
| SH | 9.4 (1.35) | 9.2 (1.07) | 12.3 (0.52)* | 11.3 (0.65)* | < .01 |
| CU | 9.51 (0.66)* | 10.1 (0.99)* | 11.51 (0.67) | 11.6 (0.27) | < .01 |
*denote significant effect of toothbrush abrasion (t test).
§showing effect of storage and surface treatment using ANOVA (P value).