Surface roughness and filler particles characterization of resin‐based composites

Abstract

The purpose of this study was to evaluate the surface roughness (Ra), and the morphology and composition of filler particles of different composites submitted to toothbrushing and water storage. Disc‐shaped specimens (15 mm × 2 mm) were made from five composites: two conventional (Z100™, and Filtek™ Supreme Ultra Universal, 3M), one “quick‐cure” (Estelite ∑ Quick, Tokuyama), one fluoride‐releasing (Beautiful II, Shofu), and one self‐adhering (Vertise Flow, Kerr) composite. Samples were finished/polished using aluminum oxide discs (Sof‐Lex, 3M), and their surfaces were analyzed by profilometry (n = 5) and scanning electron microscopy (SEM; n = 3) at 1 week and after 30,000 toothbrushing cycles and 6‐month water storage. Ra data were analyzed by two‐way analysis of variance and Tukey's test (α = 0.05). Filler particles morphology and composition were analyzed by SEM and X‐ray dispersive energy spectroscopy, respectively. Finishing/polishing resulted in similar Ra for all the composites, while toothbrushing and water storage increased the Ra of all the tested materials, also changing their surface morphology. Beautifil II and Vertise Flow presented the highest Ra after toothbrushing and water storage. Filler particles were mainly composed of silicon, zirconium, aluminum, barium, and ytterbium. Size and morphology of fillers, and composition of the tested composites influenced their Ra when samples were submitted to toothbrushing and water storage.

Color stability of nanohybrid composite resins in drinks

“…This study demonstrated the color alteration of composite resins induced by different solutions. This data complements the existing studies in the literature 3,8,10,11,30 . Providing subsidies to conclude the different compositions of the resinous matrix can promote different results with natural or synthetic pigmentation drinks.…”

“…It was demonstrated that the consumption of beverages able to stain associated with brushing challenges leads to a decrease in microhardness, which was severer in Beautifil II; therefore, the surface treatments reduced the properties of Filtek Z350 XT and Beautifil II. In another study 30 was observed that Beautifil II had the highest values for surface roughness after some superficial treatments. This fact can explain the considerable color alteration in the present study, since the surface roughness can influence the esthetic and biological outcomes of the composites 30 .…”

“…In another study 30 was observed that Beautifil II had the highest values for surface roughness after some superficial treatments. This fact can explain the considerable color alteration in the present study, since the surface roughness can influence the esthetic and biological outcomes of the composites 30 .…”

Characterization of low-cost Brazilian resin composites submitted to tooth brushing

“…The same results of this morphological analysis were found in previous studies. 24 As stated by Ruivo et al, 25 the greater the interparticle spacing, the less protected the soft resin matrix against challenges, such as brushing. A point to be borne in mind herein is that roughness values above 0.2 µm allow greater biofilm retention, representing a disadvantage to any material that may be used.…”

The effects of food simulating liquids on surface roughness, hardness, and solubility of bulk fill composites

“…Previous studies [16,20] Tanthanuch et al [21] reported an increase in surface roughness and a decrease in microhardness values, for the bulk fill composites stored in food simulating solutions and beverages for 28 days.…”