engleski

Surface roughness evaluation of restorative materials submitted to erosive challenges

Background: Most soft drinks have a very low pH and consumption is increased among children. The aim was to assessthe erosion potential of the most commonly consumed soft drinks and to determine its impact on the surface roughness of restorative materials. Methods: The materials used in this study are: nanohybrid composites (Filtek Ultimate and Tetric EvoCeram), giomer (Beautifil Flow Plus) and glass ionomer (Fuji Triage). Coca-Cola (pH=2.4), iced tea (pH=3.5) and multivitamin soda (pH=3.4) were used as acidic beverages. Artificial saliva and distilled water served as control groups. A total of 100 samples were made-25 from each material, divided into 5 groups and immersed in 5 solutions. Total of 1500 measurements was conducted by the profilometer. Surface roughness parameters (Ra, Rp, Rv, Rz) were analyzed at baseline, after 7 and 14 days of exposure to low pH. Results: Fuji Triage showed a slight decrease in roughness in Coca-Cola, which was not statistically significant (p> 0.05), while a statistically significant increase (p <0.05) was observed in ice tea and multivitamin soda. Citric acid, from iced tea and multivitamin soda, appear to be more erosive to materials containing metal cations (glass ionomer, giomer), while phosphoric acid, from Coca-Cola, degrades surface with extremely low pH, resulting in increased surface roughness within the nanohybrid composites (p<0.05). Conclusion: Restorative materials showeda different response to low pH related to acidic ingredients in soft drinks. The importance of knowing patients dietary habits is relevant in choosingthe appropriate restorative material.

composite ; surface roughness

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