Optical Properties of Paint-on Resins for Shade Modification of Crown and Bridge Resins-Light Transmittance Characteristics-

Arikawa, Hiroyuki; Kanie, Takahito; Fujii, Koichi; Homma, Tetsuya; Takahashi, Hideo; Ban, Seiji

doi:10.4012/dmj.22.272

Cited by 15 publications

(5 citation statements)

References 17 publications

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“…As for the intensity of light passing through the material, it is controlled by the absorption and scattering of the latter' s components [24][25][26] .…”

Section: Discussionmentioning

confidence: 99%

Influence of Irradiation Time on Volumetric Shrinkage and Flexural Properties of Flowable Resins

et al. 2007

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The purpose of this study was to evaluate the influence of irradiation time on volumetric change and flexural properties of flowable resins. Four commercially available flowable resins were employed. For volumetric shrinkage measurement, resin pastes were inserted into a mold (2 mm in height, 4 mm in diameter) and put into a water-filled dilatometer. This was followed by light irradiation for 10, 20, or 30 seconds at 600 mW/cm 2 . Volumetric shrinkage of the specimens was then determined from the change in the height of water meniscus, and the percentage volumetric change thereof was calculated. For flexural strength measurement, resin pastes were filled into a stainless steel mold (25×2×2 mm), and the middle one-third of the specimen was first irradiated. The remaining two-thirds were irradiated under the same irradiation conditions as volumetric shrinkage measurement. After 24-hour storage in 37℃ water, three-point flexural tests were performed with a span length of 20 mm at a crosshead speed of 1.0 mm/min. One-way ANOVA followed by Tukey' s HSD test were used for statistical analysis. For all materials tested except Estelite Flow Quick, both volumetric shrinkage and flexural strength increased with longer light irradiation time. Results of this study indicated that both volumetric shrinkage and flexural properties were influenced by light irradiation time and resin composite type.

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“…As for the intensity of light passing through the material, it is controlled by the absorption and scattering of the latter' s components [24][25][26] .…”

Section: Discussionmentioning

confidence: 99%

Influence of Irradiation Time on Volumetric Shrinkage and Flexural Properties of Flowable Resins

et al. 2007

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“…where the subscripts "E period " and "E before " refer to the CIEL ＊ a ＊ b ＊ values for each material on the white backing. In this study, ΔE ＊ values greater than or equal to 3.3 were considered as a clinically unacceptable color change and can be detected by the naked eye 2,3,[16][17][18][19][20] .…”

Section: Test Materials and Specimens Preparationmentioning

confidence: 99%

“…Currently, various types of esthetic material with different physical characteristics and colors are available [1][2][3] . In particular, resin composites are widely used because they have excellent esthetic properties and can be bonded to dentin or enamel.…”

Section: Introductionmentioning

confidence: 99%

Color Change of Newly Developed Esthetic Restorative Material Immersed in Food-simulating Solutions

et al. 2006

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Recently, an esthetic tooth coating material has been developed. The material consisted of a primer solution, a base coat, and a top coat. The purpose of this study, therefore, was to evaluate the color change of this tooth coating material and two resin composites after immersion in food-simulating, staining solutions. To this end, the newly developed coating material with and without its top coat, a flowable resin composite, and a hybrid resin composite were employed for the evaluation.The specimens were subjected to an experimental 24-hour staining cycle: 7-hour immersion in coffee, green tea or red wine, then 17-hour immersion in artificial saliva solution containing 0.3％ mucin. After 24 hours, 3 days, 1, 2, and 4 weeks of immersion, the color changes of all specimen surfaces were measured.Compared with the other materials, the ΔE ＊ value of coating material without its top coat tended to increase as the immersion period increased until 4 weeks. On the other hand, the ΔE ＊ value of coating material with its top coat measured the lowest among the materials tested. Based on the results obtained, it was concluded that when using this recently developed tooth coating material in dental clinics, its top coat should be properly applied.

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“…Light transmittance and its wavelength distribution were measured with a spectral transmittance meter with an integrating sphere (TM-1, Topcon Co., Tokyo, Japan) 15) . Measurements were recorded at 5-nm intervals from 380 nm to 700 nm of wavelength, which included most wavelengths detected by the human eye.…”

Section: Light Transmittance Characteristicsmentioning

confidence: 99%

Effect of Filler Properties in Composite Resins on Light Transmittance Characteristics and Color

et al. 2007

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The purpose of this investigation was to examine the effect of filler particle size and shape as well as filler content on light transmittance characteristics and color of experimental composite resins. A mixture of 30 mol％ Bis-GMA and 70 mol％ TEGDMA was prepared as a base monomer and to which a photoinitiator (camphorquinone) and a co-initiator (N,Ndimethylaminoethyl methacrylate) were added. Four different irregular-and spherical-shaped filler types with an average particle size of 1.9-11.1 μm were added to the mixture in three different filler contents of 20, 30, and 40 vol％. Light transmittance characteristics including light diffusion characteristics of the materials were evaluated. Color values and color differences among filler contents of the materials were also determined. Materials containing smaller and irregular-shaped fillers showed higher light transmittance and diffusion angle distribution with a sharper peak, as compared with those containing larger and spherical-shape fillers. It was also found that there was a significant correlation between the specific surface area of fillers and the color difference of the materials containing the fillers.Our results indicated that the shape of filler particles, as well as particle size and filler content, significantly affected the light transmittance characteristics-including light diffusion characteristics-and color of composite resins.

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Optical Properties of Paint-on Resins for Shade Modification of Crown and Bridge Resins-Light Transmittance Characteristics-

Cited by 15 publications

References 17 publications

Influence of Irradiation Time on Volumetric Shrinkage and Flexural Properties of Flowable Resins

Influence of Irradiation Time on Volumetric Shrinkage and Flexural Properties of Flowable Resins

Color Change of Newly Developed Esthetic Restorative Material Immersed in Food-simulating Solutions

Effect of Filler Properties in Composite Resins on Light Transmittance Characteristics and Color

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