Does Different Application Procedures Effect Hardness of Self Adherable Materials?

Abstract

Objective: To assess the effect of application procedures on the hardness of self-adherable materials after energy drink exposure. Materials and Methods: Alkasite (self-cured), alkasite (dual-cured), (HGI), HGI + coating, HGI + heating, (GC), GC + coating, GC + heating, and nanohybrid composite (control) used. Samples from the main group were distributed into three subgroups (n=12): Red Bull, Burn, artificial saliva. The samples were dipped in solutions 2-min daily, up to 6 months. Surface hardness measurements were done after the specimen preparation and after they were kept in the solution for 1 week, 1 month and 6 months. Statistical analyses were done with Friedman tests, Kruskal-Wallis and Bonferroni post hoc tests (p<0.05). Results: Dual-cured alkasite preŞented lower changes in Vickers hardness number after 6 months of immersion than self-cured alkasite (p<0.05). Coating application on HGI resulted in hardness advancement and coating application on GC significantly reduced hardness decrease in the Red Bull and Burn subgroups (p<0.05). Heating application, significantly decreased the hardness reduction in both HGI and GC (p<0.05). Conclusion: Both coating and heating procedures on HGI may protect the hardness. Also, coating was more effective on HGI than on GC. Heating can be preferred than coating for GC. Dual-cured alkasite may preŞent more resistance than self-cured alkasite