Effect of finishing on color and gloss of composites with different fillers

Stanford, W.B.; Fan, P.L.; Wozniak, Wayne T.; Stanford, John W.

doi:10.14219/jada.archive.1985.0265

Cited by 43 publications

(33 citation statements)

References 11 publications

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“…This method produced a consistent smooth surface across all specimens. 25 The latter ensures accurate hardness readings and prevents discrepancies associated with finishing/polishing procedures. The unpolished surface is, however, matrix-rich and may result in a greater degree of softening.…”

Section: Discussionmentioning

confidence: 99%

Effects of Food-simulating Liquids on Surface Properties of Giomer Restoratives

Kooi

Tan

Yap

et al. 2012

Operative Dentistry

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Giomer restoratives, like other direct and indirect composites, are softened by foodsimulating liquids, especially citric acid and ethanol. They are also roughened by citric acid. SUMMARYThis study examined the effects of food-simulating liquid (FSL) on the hardness and roughness of giomer restoratives based on prereacted glass ionomer (PRG) technology. The materials investigated included a regular (Beautifil II [BT]) and a recently introduced injectable (Beautifil Flow Plus F00 [BF]) hybrid PRG composite. A direct hybrid composite (Filtek Z250 [ZT]) and an indirect hybrid composite (Ceramage [CM]) were used for comparison. The materials were placed into customized square molds (5 mm 3 5 mm 3 2.5 mm), covered with Mylar strips, and cured according to manufacturers' instructions. The materials were then conditioned in air (control), distilled water, 50% ethanol solution, and 0.02 N citric acid at 378C for seven days. Specimens (n=6) were then subjected to hardness testing (Knoop) and surface profilometry. Data were analyzed using one-way analysis of variance and post hoc Scheffe test (p,0.05). Mean Knoop hardness values for the control group (air) ranged from 53.4 6 3.4 (BF) to 89.5 6 5.2 (ZT), while mean surface roughness values values ranged from 0.014 6 0.002 (ZT) to 0.032 6 0.001 (BT). All materials were significantly softened by FSL. The degree of soften-

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Section: Discussionmentioning

confidence: 99%

Effects of Food-simulating Liquids on Surface Properties of Giomer Restoratives

Kooi

Tan

Yap

et al. 2012

Operative Dentistry

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“…Thus, polished restorations should demonstrate an enamel-like surface texture and gloss. The appearance of the restoration is affected by the degree of surface gloss after polishing 29 and is based on reflected light from the restoration. With increased surface roughness, the degree of light reflection increases, resulting in decreased gloss.…”

Section: Discussionmentioning

confidence: 99%

Surface Roughness of Novel Resin Composites Polished with One-step Systems

Ergücü¹,

Türkün²

2007

Operative Dentistry

129

128

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SUMMARYObjectives: This study: 1) analyzed the surface roughness of five novel resin composites that contain nanoparticles after polishing with three different one-step systems and 2) evaluated the effectiveness of these polishers and their possible surface damage using scanning electron microscope (SEM) analysis. The samples were polished for 30 seconds with PoGo, OptraPol and One Gloss discs at 15,000 rpm using a slow speed handpiece. The surfaces were tested for roughness (Ra) with a surface roughness tester and examined with SEM. Oneway ANOVA was used for statistical analysis (p=0.05). MethodsResults: For all the composites tested, differences between the polishing systems were found to be significant (p<0.05). For Filtek Supreme XT, Mylar and PoGo created equally smooth surfaces, while significantly rougher surfaces were obtained after OptraPol and One Gloss applications. For Grandio, Mylar and PoGo created equally smooth surfaces, while OptraPol and One Gloss produced equally rougher surfaces. Tetric EvoCeram exhibited the roughest surface with OptraPol, while no significant differences were found between Premise and Ceram X. According to SEM images, OptraPol and One Gloss scratched and plucked the particles away from the surface, while PoGo created a uniform finish, although the roughness values were not the same for each composite.

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“…Color changes and notable gloss changes of dental-resin composites that occur between finishing and polishing, under routine clinical practice, have been clearly established in the literature (Stanford et al, 1985;Lee et al, 2002;Reis et al, 2003;Paravina et al, 2004) using mechanical devices (tactile profilometers) to measure the surface roughness. However, these devices are limited by the spatial dimension of the stylus, the measuring force, the sampling rate, and the calibration on the Z-axis (Wennerberg et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Influence of surface roughness on the color of dental-resin composites

Ghinea

Ugarte-Alván

Yebra

et al. 2011

J. Zhejiang Univ. Sci. B

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Abstract:This study deals with the influence of surface roughness on the color of resin composites. Ten resin composites (microfilled, hybrid, and microhybrid) were each polished with 500-grit, 1 200-grit, 2 000-grit, and 4 000-grit SiC papers. The roughness parameter (R a ) was measured using a Plμ confocal microscope, and field-emission scanning electron microscope (Fe-SEM) images were used to investigate filler morphology. Color was measured using a spectroradiometer and a D65 standard illuminant (geometry diffuse/0° specular component excluded (SCE) mode). Surface roughness decreased with grit number and was not influenced by filler size or size distribution. A significant influence of R a on lightness

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Effect of finishing on color and gloss of composites with different fillers

Cited by 43 publications

References 11 publications

Effects of Food-simulating Liquids on Surface Properties of Giomer Restoratives

Effects of Food-simulating Liquids on Surface Properties of Giomer Restoratives

Surface Roughness of Novel Resin Composites Polished with One-step Systems

Influence of surface roughness on the color of dental-resin composites

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