Effect of brushing on surface roughness, fluoride release, and biofilm formation with different tooth-colored materials

Abstract

Background/purpose Tooth brushing, material mechanical ageing procedure, is the most effective way in removing biofilm. The purpose of this study was to investigate the surface roughness, fluoride-release, and S. mutans biofilm formation on various tooth-colored restorative materials before and after brushing. Materials and methods Discs of materials, a nanocomposite (Filtek Z350XT; CO), a giomer (Beautifil II; GIOMER), a resin-modified glass-ionomer material (Fuji II LC; RMGI), and a conventional glass-ionomer material (Fuji IX GP Extra; GI), were prepared, polished with abrasive discs (SofLex), and divided into brushed and not brushed groups. The surface roughness of specimens was observed using a contact profilometer, fluoride-release was measured using a fluoride-specific ion electrode, and S. mutans biofilm formation, biovolume and live/dead cells, was observed under a confocal laser scanning microscope. Results Higher roughness was observed on GI and RMGI than on CO and GIOMER. Brushing had no effect on the roughness. The fluoride-release of GI and RMGI was higher than that of GIOMER. The fluoride-release decreased after brushing in all materials. The biovolume of S. mutans was not significantly different between GIOMER, RMGI and GI, while CO showed the highest. Brushing resulted in a higher biovolume for all materials, except CO, which showed no change. After brushing, all the tested materials demonstrated identical biovolumes. There were no significant differences in live/dead cells among all groups. Conclusion Brushing demonstrated a negative effect on the fluoride-release and biovolume of S. mutans biofilms for all tested materials except nanocomposites.

Effects of bioflavonoid-containing mouth rinses on optical properties of tooth-coloured dental restorative materials

“…Another contributing factor to higher staining of glass ionomer Fuji compared to composites Filtek and Gradia is lower polishability of glass ionomers than composites. Glass ionomers tend to have higher surface roughness and more generalized surface irregularities than composites 20 . Glass ionomer matrix is based on loosely bound cation cross-linked polyacid molecules and is more likely to have larger filler particles dislodged during polishing compared to more efficient silane binding of resin matrix and filler particles in composites.…”

“…Following primary colour attributes, translucency is viewed as the most important optical property and one of fundamental factors affecting aesthetic appearance of dental restorations 19 . Optical properties may be affected by extrinsic and intrinsic differences in materials, such as surface roughness 20 and sorption 21 , 22 .…”

Clinical evaluation of white spot lesions treated by surface pre-reacted glass filler coating material in comparison with Icon resin infiltration by laser fluorescence. (A randomized controlled trial)

“…Also, there were signi cant increase in the LF scores in ICON group by time, this may be due to lose of the outer shell as acid conditioning and the degradation effect of the material over time. This allows entrance of the bacteria to continue the demineralization process, making the lesion prone to progression (41) . This nding was in accordance with Baa f et al, (17) who found signi cant differences between baseline, and all follow up intervals LF scores at the 3, 6,12 month follow up.…”

In Vitro Evaluation of the Shading Effect of Various Zirconia Surface Stains on Porcelain Crowns

“…The contact angle is generally used to assess the hydrophilicity and hydrophobicity of a material surface [42]. In this study, pure water was used to test the zirconia surfaces (Figure 4b).…”