Light transmittance characteristics of light-cured composite resins

Arikawa, Hiroyuki; Fujii, Koichi; Kanie, Takahito; Inoue, Kastuichiro

doi:10.1016/s0300-5712(99)00014-7

Cited by 126 publications

(98 citation statements)

References 15 publications

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“…Since the refraction index of the filler particles is not the same as that of the organic matrix, the filler particles tend to contribute to dispersion of the light at the matrix/filler interface during photoactivation. Furthermore, since particle size is one of the main factors influencing dispersion of light (some sizes interfere with the dispersion of specific light wave lengths), 23,24,25,26,27 DC could be affected by the particle size distribution of the filler. However, in agreement with a previous study, 4 DC was not affected by the tested filler distribution.…”

Section: Discussionmentioning

confidence: 99%

Influence of silane content and filler distribution on chemical-mechanical properties of resin composites

et al. 2015

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This study investigated the influence of silane concentration and filler size distribution on the chemical-mechanical properties of experimental composites. Experimental composites with silane contents of 0%, 1% and 3% (in relation to filler mass) and composites with mixtures of barium glass particles (median size = 0.4, 1 and 2 μm) and nanometric silica were prepared for silane and filler analyses, respectively. The degree of conversion (DC) was analyzed by FTIR. Biaxial flexural strength (BFS) was tested after 24-h or 90-d storage in water, and fracture toughness, after 24 h. The data were subjected to ANOVA and Tukey's test (p = 0.05). The DC was not significantly affected by the silane content or filler distribution. The 0% silane group had the lowest immediate BFS, and the 90-d storage time reduced the strength of the 0% and 3% groups. BFS was not affected by filler distribution, and aging decreased the BFS of all the groups. Silanization increased the fracture toughness of both the 1% and 3% groups, similarly. Significantly higher fracture toughness was observed for mixtures with 2 μm glass particles. Based on the results, 3% silane content boosted the initial strength, but was more prone to degradation after water storage. Variations in the filler distribution did not affect BFS, but fracture toughness was significantly improved by increasing the filler size.

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Section: Discussionmentioning

confidence: 99%

Influence of silane content and filler distribution on chemical-mechanical properties of resin composites

et al. 2015

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“…The color of teeth is influenced by complex factors such as lighting conditions to the objects, and translucency, opacity, light scattering, and gloss of teeth (1). Characteristics of light transmittance and their influence to the color of various shades of resin composites were evaluated (2), indicating that light transmittance characteristics play an important role in the color of resin composites.…”

Section: Introductionmentioning

confidence: 99%

Color characteristics of resin composites in different color modes and geometries

et al. 2009

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“…Metal ZiO2 nanofiller present in FS might decrease light transmittance through the resin increment due to light scattering [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Hence, one may assume that FS requires high irradiance levels to polymerize bottom surfaces similarly to FZ.…”

Section: Discussionmentioning

confidence: 99%

Curing Quality of Composites as Influenced by the Filler Content, Light Source and Curing Time

Borges¹,

Groninger²,

Soares³

et al. 2011

Dentistry

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The quality of composite polymerization has been of great concern for researchers. Curing of nanocomposites under long distance (8-mm) and extended light exposure through conventional (halogen and LED) and argon laser lamps is unclear in the literature. This study evaluated the influence of curing modes and filler particle size on hardness and degree of conversion of dental composites photoactivated at an 8-mm distance. Light sources (LED 1100mW/cm2-Bluephase; LED 700mWcm2-Ultra-lume; halogen lamp 450mW/cm2-XL3000; and argon-laser 500mW/cm2-AccuCure), curing times (20 and 60 s), microhybrid (Filtek-Z250) and nanofilled (Filtek-Supreme) resins were investigated. Eighty samples (n=5) were made using Teflon molds. Hardness and degree of conversion were obtained for bottom/top surfaces of 2-mm increments. Data were submitted to ANOVA and Tukey tests (α=5%).Top surfaces showed similar hardness. A 60s exposure time increased bottom hardness and Filtek-Z250 showed higher hardness for curing units except Bluephase. Regarding degree of conversion, bottom/top surfaces showed similar means at 60s; at 20s, bottom/top surfaces revealed similar means only for Filtek-Z250 cured by Bluephase and Ultra-lume. High irradiance and extended exposure time can improve hardness and conversion on bottom surface. Microhybrid resin presented better conversion of monomers than the nanofilled composite under higher irradiance and extended exposure times.

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Light transmittance characteristics of light-cured composite resins

Cited by 126 publications

References 15 publications

Influence of silane content and filler distribution on chemical-mechanical properties of resin composites

Influence of silane content and filler distribution on chemical-mechanical properties of resin composites

Color characteristics of resin composites in different color modes and geometries

Curing Quality of Composites as Influenced by the Filler Content, Light Source and Curing Time

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