Chemical and morphological features of nanofilled composite resin: Influence of finishing and polishing procedures and fluoride solutions

Abstract

This study evaluated the influence of finishing and polishing procedures and different fluoride solutions on superficial morphology and chemistry of the nanofilled composite resin Supreme XT (3M) through the EDX analysis and SEM evaluation. Circular specimens (n = 30) of 10 mm diameter and 2 mm thickness were prepared, with half of the sample assays finished and polished with Super-Snap® sandpaper. The experimental groups were divided according to the presence or absence of finishing and polishing and solutions (artificial saliva, 0.05% of manipulated sodium fluoride solution, Fluordent Reach, Oral B, Fluorgard). Specimens were immersed in each respective solution for 1 min per day, during 60 days and stored in artificial saliva at 37 ± 1°C between immersion periods. Topography and chemical analysis was qualitative. It was observed that specimens submitted to finishing and polishing procedures had lower superficial degradation. Fluoride solutions promoted superficial alterations on specimens, being the highest degradation obtained with Fluordent Reach. It can be concluded that finishing and polishing procedures and the immersion media influence the superficial morphology of composite resin tested; the Fluordent Reach was the fluoride solution that most affected the material's surface.

Influence of surface properties of resin‐based composites on in vitro Streptococcus mutans biofilm development

“…For commercially available resin‐based composites, differences in resin and filler chemistry, as well as in filler size and shape, account for differences in terms of SR and surface chemistry after polishing . In addition, the polishing procedure substantially modifies the physicochemical characteristics of a resin‐based composite surface by removing the matrix‐rich superficial resin‐based composite layers and producing a surface that is chemically and physically distinct from its unpolished counterpart . Thus, differences in the composition of the resin‐based composite, as well as the polishing procedure, might have an impact on biofilm formation on the resin‐based composite surface .…”

Influence of light curing units and fluoride mouthrinse on morphological surface and color stability of a nanofilled composite resin

“…Celik et al () also observed that the Oral B mouthrinse solution did not have a significant influence on the color stability of a nanofilled composite resin. On the other hand, Oliveira et al () verified that Fluordent Reach promoted a greater degree of surface degradation in the studied resin.…”

“…It is difficult to compare the results obtained in this study with those in the literature because there is a scarcity of studies (Celik et al, 2008;Oliveira et al, 2012) that evaluated the effects of 0.05% sodium fluoride solutions on the color stability and surface morphology of composite resin. Celik et al (2008) also observed that the Oral B mouthrinse solution did not have a significant influence on the color stability of a nanofilled composite resin.…”

“…Moreover, the properties of nanofilled resins need to be investigated further, since they has a higher percentage of load and nanoclusters, capable of improving properties (Mitra et al, 2003;Yap et al, 2004) such as color stability. Although studies assessing staining susceptibility of nanofilled resins in various immersion media have been performed, (De Oliveira et al, 2014;Domingos et al, 2011;Fontes et al, 2009;Oliveira et al, 2012Oliveira et al, , 2014Santos et al, 2010) the influence of fluoride mouth rinse solutions on the color stability of nanofilled resins cured by different light sources is unknown.…”

Effects of Fruit Drinks on Surface Roughness of Esthetic Restorative Materials.

“…22,23 However, another study observed this phenomenon only for one resin composite material, whereas other resin composites showed no significant differences in surface roughness between the surfaces polished with silicone carbide paper and those polymerized against Mylar strips. 16,23 In the present study; the specimens were cured against a Mylar strip and no further finishing or polishing was done except that the top surface of each specimen was finished to a uniform surface using #600 grit silicone carbide papers and polished with Soflex system. This protocol was followed for all materials.…”