- Journal of Istanbul University Faculty Dentistry
- Vol: 54 Issue: 2
- Effects of surface coating on the flexural strength of fluoridereleasing restorative materials after...
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 : 11 | Download : 4
Publication Date : 2020-05-30
Article Type : Research
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 (GCP), Amalgomer CR (AHL), Zirconomer (Shofu), Fuji IX GP Capsule (GC), Beautifil II (Shofu), Estelite Σ Quick (Tokuyama) and reliaFIL LC (AHL). The specimens were randomly divided into two groups; surface coated with G-Coat Plus (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 (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 (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 (p<0.05). This significant increase was observed on the flexural strength of only Amalgomer CR and Zirconomer after 1 year (p<0.05). The highest flexural strength was obtained with Beautifil II, Estelite Σ Quick and reliaFIL LC after 24 h and 1 year (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