Change in surface properties of two different dental resin composites after using various beverages and brushing

Abstract

Background The study aimed to evaluate the influence of various beverages; with and without brushing; on the surface mechanical properties of two resin composites. Methods A total of 160 disc-shaped specimens were prepared for each of the following dental composites; nanohybrid ormocer (Admira fusion, VOCO GmbH, Cuxhaven, Germany) and nanohybrid resin composite (Grandio, VOCO GmbH, Cuxhaven, Germany). The baseline surface hardness and roughness measurements were carried out after 24 h. The composite samples were randomly distributed into one of the two groups; brushing and non-brushing, which were further divided into one of the four subgroups (n = 10); artificial saliva as control, coffee, red wine, and soft drink. In the non-brushing group, the specimens were immersed in the different beverages for five minutes three times daily for 30 days. The same procedure was done for the brushing group, in addition to brushing the specimens for five seconds. The surface hardness and roughness measurements were repeated after 30 days. One-way ANOVA and independent t-tests were used for statistical analysis. Results The soft drink had the most deteriorating effect and artificial saliva had the least. The change in surface properties was higher in the brushing subgroups. Grandio exhibited a higher change in surface microhardness while Admira fusion exhibited a higher change in surface roughness. Conclusions The surface properties of both dental resin composites were negatively affected by using beverages and brushing.

Evaluating flexure properties, hardness, roughness and microleakage of high-strength injectable dental composite: an in vitro study

“…A 500 g weight was placed over the glass slide for one minute to create a flat surface and standardize the force applied to it. Following the removal of the weight, light curing of the specimen was done via the glass slide [15]. LED light curing unit (Bluephase 2: Ivoclar Vivadent, Lichtenstein) with a light intensity of 1200 mW2 for 40 s was used.…”