Evaluation of structural coloration of experimental flowable resin composites

Abstract

Objective: To examine the effect of filler contentTo examine the effect of filler content on structural coloration of experimental flowable resin composites. Overview: Experimental composites containing spherical fillers and different filler contents (30, 40, 50, 60 and 70 wt%), a structural colored resin composite (Omnichroma), and a nanohybrid flowable resin composite (Gracefil LoFlo) were used. The optical characteristics of the specimens were measured on standard black and white backgrounds using a spectrophotometer under CIE D65 illuminant and the L*a*b* values were determined. The color matching abilities to artificial teeth were evaluated using the ΔE*ab and ΔE00 color difference formulas. One-way analysis of variance and Tukey's post hoc test were used. The spectral reflectance of experimental composites showed different trends in different backgrounds, plate thickness, and filler contents. In particular, higher spectral reflectance was observed on the white background at wavelengths ranging from 450 to 700 nm in both 1.5 and 3.0 mm plates when compared to the black background. The percent reflectivity tended to decrease with a decrease of the filler contents. The color matching abilities of the experimental composites improved with the increase in the filler contents. Conclusions: Structural coloration of the flowable resin composites were affected by the filler contents. Clinical significance: Clinical Significance: Higher filler contents might be needed to achieve the optimal color properties of structural colored flowable resin composites, thereby improving the restoration esthetics.

The effect of refractive index of fillers and polymer matrix on translucency and color matching of dental resin composite

“…In case of materials containing different components, such as resin composites, the different components like the inorganic fillers and the resin matrix are needed to have similar refractive indices (RI) in order to become highly translucent [ 11 ]. The effect of the loading ratio, type and particle size of the fillers on the appearance of resin composites has been explored in literature in several studies [ 12 , 13 ]. Resin composites additionally include an organic matrix with a RI that varies from those of the inorganic fillers.…”

“…Resin composites additionally include an organic matrix with a RI that varies from those of the inorganic fillers. The refractive index of the fillers should vary from 1.47 to 1.52 and match that of the cured resin matrix [ 13 ]. If there is a mismatch between the RI of the filler and the resin matrix, the filler may rise the opacity of the materials owing to extreme refraction and reflection at the filler-matrix interfaces [ 11 ].…”

Başlangiç Okluzal Çürüklere Uygulanan İki̇ Farkli Nano Kompozi̇ti̇n İki̇ Yillik Kli̇ni̇k Performansi

“…Ayrıca akışkan kompozitlerin yüksek organik matriks içeriği su emiliminin fazla olmasına ve restorasyonlarda zaman içinde renk değişimi görülmesine neden olmaktadır. 19,20 Karaman ve diğ. çürüksüz servikal lezyonlara uyguladıkları nanofil ve akışkan kompozitlerin 24 ay klinik takibini yapmışlar ve renk uyumu açısından akışkan kompozitlerin hepsinin alfa skoru aldığını vurgulamışlardır.…”

Flexural Strength and Depth of Cure of Single Shade Dental Composites

“…There are several papers in the currentliterature assessing the esthetic qualities of single and group shade dental resin composite materials [14][15][16][17][18][19][20]. However, the literature discussing the physical and mechanical properties of these materials is limited at this time [15,21].…”