Changes on transmittance mode of different composite resins

Queiroz, Renata Fernandes de; Lima, João Paulo Martins de; Malta, Daniel Alexandre Menezes Pedrosa; Rastelli, Alessandra Nara de Souza; Cuin, Alexandre; Porto-Neto, S. T.

doi:10.1590/s1516-14392009000200003

Cited by 20 publications

(3 citation statements)

References 22 publications

(29 reference statements)

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“…Carefully modulated optical properties, such as color, translucency, fluorescence, and opalescence, are needed to offer a natural appearance to the tooth (Arimoto et al, ; Queiroz et al, ; Yu, Lim, & Lee, ); such properties are controlled by the depth and kinetics of polymerization (Howard, Wilson, Newman, Pfeifer, & Stansbury, ; Kawaguchi, Fukushima, & Miyazaki, ). Differences in the composition of composite resins, in particular with respect to their organic matrix, dispersed filler particles, pigments, and modifiers, are also responsible for the variation of such properties (Song, Yu, Ahn, & Lee, ; Woo, Yu, Ahn, & Lee, ).…”

Section: Introductionmentioning

confidence: 99%

Analysis of transmittance and degree of conversion of composite resins

et al. 2019

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The objective of this study was to evaluate and correlate light transmittance (T), initial degree of conversion (IDC), and degree of conversion after 24 hr (DC24) for 22 composite resins (CR) for enamel and dentin use. The transmittance (n = 10) was measured with a spectrometer at a wavelength of 468.14 nm. The degree of conversion (DC; n = 5) was measured with Fourier Transform Near‐Infrared Spectroscopy before polymerization, immediately after photoactivation, and 24 hr after photoactivation. Both sets of values are provided as percentages. ANOVA and Games‐Howell (α = 5%) tests showed that Filtek Supreme Ultra gave the highest T values of all enamel CRs, while Esthet‐X HD presented the lowest. Meanwhile, Venus diamond gave the highest values of all dentin CRs, while Esthet‐X HD gave the lowest. For IDC and DC24, ANOVA showed differences between individual CRs and the two CR types (p < .0001). Despite the limitations of this study, it can be concluded that there was no correlation between T and either IDC or DC24 (p > .05); however, IDC and DC24 were strongly correlated (p < .05) by Pearson's correlation. That being said, as a higher DC reflects better mechanical properties, certain conclusions can be drawn about overall performance. The best IDC values were observed for the Opallis enamel resin and the Opallis and Premise dentin resins. Meanwhile, the best DC24 values were observed for the Opallis, Charisma, and Premise enamel resins and the Opallis and Premise dentin resins. Degree of conversion and light transmittance showed differences between composite resin types (enamel and dentin) and brands. It is important to know at the moment of composite choice taking into account mechanical and optical properties.

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Section: Introductionmentioning

confidence: 99%

Analysis of transmittance and degree of conversion of composite resins

et al. 2019

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“…Additionally, the transmission of light energy into the composites may be diminished by the increase in darkness of the composite shade [35] (Figure 7). Furthermore, dark pigments of a color modifier may block the light penetration or increase the light scattering due to the increase in refractive index mismatch in the composites [9,36,37]. It was reported that the color pigments may act as the light-scattering centers, which could reduce light penetration into the composites in a dose-dependent manner [38].…”

Section: Discussionmentioning

confidence: 99%

Effects of Color Modifier on Degree of Monomer Conversion, Biaxial Flexural Strength, Surface Microhardness, and Water Sorption/Solubility of Resin Composites

et al. 2021

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Color modifiers can be mixed with resin composites to mimic the shade of severely discolored tooth. The aim of this study was to assess the effects of a color modifier on the physical and mechanical properties of a resin composite. The composite was mixed with a color modifier at 0 wt% (group 1), 1 wt% (group 2), 2.5 wt% (group 3), or 5 wt% (group 4). The degree of monomer conversion (DC) was examined after light curing for 20 or 40 s. Biaxial flexural strength (BFS)/modulus (BFM), surface microhardness (SH), and water sorption (Wsp)/solubility (Wsl) were also tested. The DC of group 1 was significantly higher than that of groups 3 and 4. The increase in curing time from 20 to 40 s increased the DC by ~10%. The BFS, BFM, Wsp, and Wsl of all the groups were comparable. A negative correlation was detected between the concentration of color modifier and the BFS and DC, while a positive correlation was observed with Wsp. In conclusion, the color modifier reduced the DC of composites, but the conversion was improved by extending the curing time. The increase in color modifier concentration also correlated with a reduction in strength and the increase in the water sorption of the composites.

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“…The specimens were prepared using a polished Teflon™ matrix of 4.0 mm depth and 10.0 mm internal diameter 15,[19][20][21][22] in which the composite resin was added. Thus, 20 specimens were prepared using Filtek™ Bulk-Fill composite resin (3M ESPE), and the other 20 specimens used Filtek™ Z350 XT composite resin (3M ESPE).…”

Section: Methodsmentioning

confidence: 99%

Comparative analysis of the surface roughness of conventional resins and filling after immersion in mouthwashes

et al. 2020

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Aim: Bulk Fill composite resins were released on the market in order to reduce the time in clinical sessions by using increments of up to 5.0 mm thickness. The aim of this study was to evaluate the effect of the rinsing solutions on the surface roughness of the conventional composite and Bulk fill composite resins. Methods: 40 specimens were prepared from a 4.0mm x 10.0mm teflon matrix and photoactivated for 20 seconds, with 20 specimens made of Filtek Bulk-Fill composite resin (3M ESPE) and 20 specimens made with Filtek™ Z350 XT composite resin (3M ESPE). Each group was subdivided into 2 subgroups: G1 (Filtek™ Z350 XT-3M ESPE-immersed in Colgate PlaxWhitening®); G2 (Filtek™ Z350 XT-3M ESPE-immersed in PlaxFreshMint®); G3 (Filtek™ Bulk-Fill-3M ESPE-immersed in Colgate PlaxWhitening®) and G4 (Filtek™ Bulk-Fill-3M ESPE-immersed in Colgate PlaxFreshMint®). The surface roughness test was performed initially and after immersion in rinses by the Time Group Inc.-TR200® rugosimeter apparatus and the data were submitted to statistical analysis (two-way repeated measures ANOVA). Results: Surface roughness values of the Filtek™ Bulk-Fill composite resin (3M ESPE) were significantly higher than the Filtek™ Z350 XT composite resin (3M ESPE) (P <0.0001). However, no differences were identified before and after immersion in rinses with or without alcohol. Conclusion: The use of mouthwashes does not interfere with the surface roughness of the tested resins, but the composite resin Filtek Z350 XT (3M ESPE) presents a surface with less roughness.

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Changes on transmittance mode of different composite resins

Cited by 20 publications

References 22 publications

Analysis of transmittance and degree of conversion of composite resins

Analysis of transmittance and degree of conversion of composite resins

Effects of Color Modifier on Degree of Monomer Conversion, Biaxial Flexural Strength, Surface Microhardness, and Water Sorption/Solubility of Resin Composites

Comparative analysis of the surface roughness of conventional resins and filling after immersion in mouthwashes

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