Differences in color, translucency and fluorescence between flowable and universal resin composites

Yu, Bin; Lee, Yong‐Keun

doi:10.1016/j.jdent.2008.06.003

Cited by 71 publications

(63 citation statements)

References 21 publications

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“…Amongst the plethora of commercially available RBCs, translucency varied significantly within each brand according to shade designation; and for the same shade designation, translucency varied across the different brands 1) . For the same brand and shade designation, the translucency of flowable RBC differed significantly from that of universal RBC 2) . Both investigations have shown that the translucency of a RBC is influenced by its material composition.…”

Section: Introductionmentioning

confidence: 90%

Effects of aging and irradiation time on the properties of a highly translucent resin-based composite

Bauer

Ilie

2013

Dent. Mater. J.

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This study investigated the effects of aging and irradiation time on the macro-and micro-mechanical properties of a highly translucent nanohybrid composite (IPS Empress Direct, Trans Opal shade, Ivoclar Vivadent). Flexural strength, flexural modulus, indentation modulus, Vickers hardness, and creep were measured after being irradiated with different durations (5, 10, 20, and 40 s) and aged under different conditions (24 h at 37°C in water; 5,000 times of thermocycling between 5°C and 55°C followed by 4-week storage in artificial saliva or alcohol). Rate of cure was also measured for these four irradiation times at composite specimen surface and at 2 mm depth. Effects of aging and irradiation time were statistically analyzed using one-way ANOVA with Tukey's HSD post hoc test (α=0.05), partial eta-squared statistic, and Weibull analysis. Alcohol aging significantly reduced the mechanical properties. Aging in saliva produced a positive effect on micro-mechanical properties. Irradiation time should be at least 20 s to yield favorable mechanical properties.

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Section: Introductionmentioning

confidence: 90%

Effects of aging and irradiation time on the properties of a highly translucent resin-based composite

Bauer

Ilie

2013

Dent. Mater. J.

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“…25 These leached products alter the microstructure of the matrix, creating voids and microcrack formations 10 that allow stain penetration and discoloration. 2,4 In response to the lack of research on the color instability of conventional flowable composites 14,15 and the apparent absence of literature on new flowable composites, this study aimed to evaluate the effects of immersion in a range of beverages on the color change and water sorption of nine flowable composites at multiple time points over 6 months. The first null hypothesis was that increased color change is not related to water sorption in composites maintained at 37°C for 6 months.…”

Section: Introductionmentioning

confidence: 99%

Six-month color change and water sorption of 9 new-generation flowable composites in 6 staining solutions

et al. 2016

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Six-month color change and water sorption of 9 new-generation flowable composites in 6 staining solutions Abstract: Color match and water sorption are two factors that affect restorative materials. Discoloration is essential in the lifespan of restorations. The aim of this study was to evaluate color change and water sorption of nine flowable composites at multiple time points over 6 months. 60 samples of each composite were divided into two groups (Color Change and Water Sorption/Solubility). Each Color Change group was divided into six subgroups, which were immersed in distilled water (DW), coffee (CF), Coca-Cola (CC), red wine (RW), tea (TE) and orange juice (OJ). The color was measured at the baseline, 1, 2, 3 and 4 weeks, and 3 and 6 months and color change values ( . Vertise Flow showed the highest water sorption (W S = 69.10 ± 7.19). The Pearson test showed statistically significant positive correlations between water sorption and solubility and between water sorption and ∆E; the positive solubility-∆E correlation was not statistically significant. The findings suggest that water sorption is one factor associated with the ability of composites to discolor; however, discoloration is a multifactorial problem.

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“…As the translucency of a material increases, more light is absorbed until the relevant portion of the light is reflected. The different translucencies of dental materials have been investigated by several studies using the translucency parameter (TP) [9][10][11][12][13][14][15][16][17][18][19]. In all of the referenced studies, the TP was determined by measuring the values for L* (lightness), a* (redgreen chromatic coordinates), b* (yellow-blue chromatic coordinates) over W -background (values determined using a white background) and B -background (values determined using a black background) and then substituting them into the following equation:…”

Section: Introductionmentioning

confidence: 99%

Influence of material surface on the scanning error of a powder-free 3D measuring system

2015

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OBJECTIVES This study aims to evaluate the accuracy of a powder-free three-dimensional (3D) measuring system (CEREC Omnicam, Sirona), when scanning the surface of a material at different angles. Additionally, the influence of water was investigated. MATERIALS AND METHODS Nine different materials were combined with human tooth surface (enamel) to create n = 27 specimens. These materials were: Controls (InCoris TZI and Cerec Guide Bloc), ceramics (Vitablocs® Mark II and IPS Empress CAD), metals (gold and amalgam) and composites (Tetric Ceram, Filtek Supreme A2B and A2E). The highly polished samples were scanned at different angles with and without water. The 216 scans were then analyzed and descriptive statistics were obtained. RESULTS The height difference between the tooth and material surfaces, as measured with the 3D scans, ranged from 0.83 m (±2.58 m) to -14.79 m (±3.45 m), while the scan noise on the materials was between 3.23 m (±0.79 m) and 14.24 m (±6.79 m) without considering the control groups. Depending on the thickness of the water film, measurement errors in the order of 300-1,600 m could be observed. CONCLUSIONS The inaccuracies between the tooth and material surfaces, as well as the scan noise for the materials, were within the range of error for measurements used for conventional impressions and are therefore negligible. The presence of water, however, greatly affects the scan. CLINICAL RELEVANCE The tested powder-free 3D measuring system can safely be used to scan different material surfaces without the prior application of a powder, although drying of the surface prior to scanning is highly advisable. AbstractObjectives This study aims to evaluate the accuracy of a powder-free 3D measuring system (CEREC Omnicam, Sirona), when scanning the surface of a material at different angles.Additionally, the influence of water was investigated. Materials and MethodsNine different materials were combined with human tooth surface (enamel) to create n = 27 specimens. These materials were: Controls (InCoris TZI, Cerec Guide Bloc), ceramics (Vitablocs ® Mark II and IPS Empress CAD), metals (gold and amalgam) and composites (Tetric Ceram, Filtek Supreme A2B and A2E). The highly polished samples were scanned at different angles with and without water. The 216 scans were then analyzed and descriptive statistics were obtained. ResultsThe height difference between the tooth and material surfaces, as measured with the 3D-scans, ranged from .83 (± 2.58) to -14.79 (± 3.45) µm, while the scan noise on the materials was between 3.23 (± .79) and 14.24 (± 6.79) µm without considering the control groups.Depending on the thickness of the water film, measurement errors in the order of 300-1600 µm could be observed. ConclusionsThe inaccuracies between the tooth and material surfaces, as well as the scan noise for the materials, were within the range of error for measurements used for conventional impressions and are therefore negligible. The presence of water, however, greatly affects the scan.Clinical Relevance The...

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Differences in color, translucency and fluorescence between flowable and universal resin composites

Cited by 71 publications

References 21 publications

Effects of aging and irradiation time on the properties of a highly translucent resin-based composite

Effects of aging and irradiation time on the properties of a highly translucent resin-based composite

Six-month color change and water sorption of 9 new-generation flowable composites in 6 staining solutions

Influence of material surface on the scanning error of a powder-free 3D measuring system

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