Effects of surface coating on the flexural strength of fluoridereleasing restorative materials after water aging for one year

Authors : Muhittin UĞURLU

Pages : 62-68

Doi:10.26650/eor.20200042

View : 9 | Download : 7

Publication Date : 2020-05-30

Article Type : Research Paper

Abstract :Purpose: To evaluate the effects of surface coating and one-year water storage on the flexural strength of fluoride-releasing restorative materials. Materials and Methods: Forty specimens were prepared from each material; GCP Glass Fill insert ignore into journalissuearticles values(GCP);, Amalgomer CR insert ignore into journalissuearticles values(AHL);, Zirconomer insert ignore into journalissuearticles values(Shofu);, Fuji IX GP Capsule insert ignore into journalissuearticles values(GC);, Beautifil II insert ignore into journalissuearticles values(Shofu);, Estelite Σ Quick insert ignore into journalissuearticles values(Tokuyama); and reliaFIL LC insert ignore into journalissuearticles values(AHL);. The specimens were randomly divided into two groups; surface coated with G-Coat Plus insert ignore into journalissuearticles values(GC); and uncoated. Each group was subdivided into two groups stored in distilled water at 37◦C for 24 h and 1 year before testing insert ignore into journalissuearticles values(n=10);. The flexural strength was evaluated using three-point bending test according to the ISO 4049:2009 standard using a universal testing machine. After flexural strength test, a cross-section of the coated specimens was evaluated with scanning electron microscopy insert ignore into journalissuearticles values(SEM);. Results: A significant increase was observed on the flexural strength of Amalgomer CR, Zirconomer and Fuji IX GP after 24 h when G-Coat Plus was applied insert ignore into journalissuearticles values(p<0.05);. This significant increase was observed on the flexural strength of only Amalgomer CR and Zirconomer after 1 year insert ignore into journalissuearticles values(p<0.05);. The highest flexural strength was obtained with Beautifil II, Estelite Σ Quick and reliaFIL LC after 24 h and 1 year insert ignore into journalissuearticles values(p<0.05);. After 1 year, there was decrease on the flexural strength of the other materials except Beautifil II, Estelite Σ Quick and reliaFIL LC. Conclusion: The resin coating improved the flexural strength of some glass ionomer-based materials but the water aging decreased the same physical properties.
Keywords : Flexural strength, Glass ionomer cement, Scanning electron microscopy, Surface coating, Water aging