European Journal of Biomedical and Pharmaceutical Sciences

SURFACE ROUGHNESS OF RESTORAT?VE MATER?ALS- AN AFM STUDY ?N DENT?STRY

*Colak Gulben

ABSTRACT

Objective: This study's objective was to evaluate the surface roughness of the five restorative materials. Materials and Methods: Five materials were used to construct the specimens: a high viscosity GIC (Fujı IX GP; GC, Tokyo, Japan), an RMGIC (Fujı II LC; GC, Tokyo, Japan), a giomer (Beautifil II; Shofu, Kyoto, Japan) a nano-filled resin composite (Estelite Σ Quick; Tokuyama, Tokyo, Japan) and a micro-hybrid resin composite (Charisma Smart; Heraeus Kulzer, Hanau, Germany). In a teflon mold, fifteen bar-shaped specimens of each material were created (n=15). Each group was stored in distilled water at 37°C for 24 hours before testing. The specimens’ mean surface roughness values (Ra) were calculated using atomic force microscopy (AFM). The Kolmogorov-Smirnov test was applied to verify if the data were normally distributed. One-way ANOVA and Tukey HSD posthoc analyses were used to compare the groups' mean surface roughness values (P = 0.05). Results: The highest surface roughness value was found in the high viscosity GIC (p<0.05). The lowest surface roughness values were obtained from the giomer, the nanohybrid resin composite, and the micro-hybrid resin composite (p<0.05). The surface roughness values of the giomer, the nanohybrid resin composite, and the micro-hybrid resin composite were not statistically different (p>0.05). The resin-modified glass ionomer showed statistically a lower surface roughness value than the high viscosity glass ionomer (p<0.05). Conclusion: While the addition of resin to glass ionomer cement improves the surface roughness properties of the material, there is no difference between the surface roughness values of resin composites and the giomer.

Keywords: High viscosity glass ionomer cement, resin-modified glass ionomer cement, giomer, surface roughness.