Abstract:
The aims of this study was to evaluate on the effects of surface coating agents on surface hardness of twobis-acryl provisional materials by using Vicker's hardness tester. Forty bis-acryl specimens which were finished and polished were randomly divided into 8 groups, with n=5. 1) ProtempTM 4 without surface coating, 2) ProtempTM 4 coated with Palaseal®, 3) ProtempTM 4 coated with EQUIA Forte® coat, 4) ProtempTM 4 coated with OptibondTM FL, 5) LuxaTemp® without surface coating, 6) LuxaTemp® coated with Palaseal®, 7) uxaTemp® coated with EQUIA Forte® coat, 8) LuxaTemp® coated with OptibondTM FL. The specimens from each group were tested for surface hardness by Vickers surface hardness tester. Load used was 50 g for 15 seconds. The indentations made were evaluated and measured with stereomicroscope at 50x. The measurements were converted into HV (Vickers hardness number) and analyzed with SPSS V 24.0.
The mean surface hardness values of LuxaTemp® group were statistically higher than ProtempTM 4 group. The mean surface hardness values of LuxaTemp® group were statistically decreased after application of Palaseal® and OptibondTM FL. There were no statistically significant difference between the surface hardness values of LuxaTemp® group that was coated with EQUIA Forte® coat and LuxaTemp® control group. However, it was statistically different from the surface hardness of the other groups.
The effect of surface coating agent on enhancement of surface hardness of bis-acryl provisional materials was not significantly observed.