Refractive-index-adjustable Fillers for Visible-light-cured Dental Resin Composites: Preparation of TiO 2-SiO2 Glass Powder by the Sol-gel Process

Suzuki, Hiroyuki; Taira, Masayuki; Wakasa, K.; Yamaki, M.

doi:10.1177/00220345910700050401

Cited by 53 publications

(40 citation statements)

References 24 publications

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“…Suzuki et al reported a dental resin composite consisting of bis-GMA/TEGDMA and newly added TiO 2 -SiO 2 glass powder produced by a sol-gel process, 34 and showed that a larger monomer conversion was obtained by adding TiO 2 -SiO 2 glass powder. Stansbury and Antonucci reported composites consisting of bis-GMA/MBL or bis-GMA/TEGDMA/MBL.…”

Section: Discussionmentioning

confidence: 99%

Bioactive bone cement: Effect of surface curing properties on bone-bonding strength

Shinzato

Kobayashi

Mousa

et al. 2000

J. Biomed. Mater. Res.

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The fact that bisphenol-a-glycidyl methacrylate (bis-GMA)-based cements contain an uncured surface is believed to play an important role when determining the surface curing properties of the cements. Therefore, in the present study, the bone-bonding strength of cement plates having an uncured surface on one side and a cured surface on the other side has been evaluated. These cement plates were composites of a bis-GMA-based resin with either an apatite- and wollastonite-containing glass-ceramic (AW-GC) powder or a hydroxyapatite (HA) powder, respectively designated AWC and HAC. The amount of each of these powders in a composite cement was 70 wt %. We formulate the hypothesis that the uncured surface of a cement plate is bioactive having bone-bonding properties. The goal of the present study was to indicate the bone-bonding strength of the uncured surfaces of AWC and HAC and compare the strength with the respective cured surfaces by a detaching in vivo test, as well as to histologically examine the bone-cement interface. Each plate has been implanted into the tibiae of male Japanese white rabbits, taking care to retain the surface properties, and the so-called "failure load has been measured using a detaching test followed 8 weeks after implantation. The failure load for AWC-plates at the uncured surface (2.05 +/- 1.11 kgf, n = 8) was significantly higher than AWC at its cured surface side (0.28 +/- 0.64 kgf, n = 8). The failure load for HAC-plates at the uncured surfaces (1.40 +/- 0.68 kgf, n = 8) was significantly higher than HAC at its cured surface (0.00 +/- 0.00 kgf, n = 8). Failure loads for AWC at its uncured and cured surfaces were both higher than for HAC, although not significantly. Direct bone formation has been observed histologically for both AWC and HAC on the uncured surfaces, and a Ca-P-rich layer was observed only at the uncured surface of AWC. These findings strongly suggest that uncured surfaces are useful for exposing a bioactive filler on a surface of composites, being very effective in inducing bone bonding.

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Section: Discussionmentioning

confidence: 99%

Bioactive bone cement: Effect of surface curing properties on bone-bonding strength

Shinzato

Kobayashi

Mousa

et al. 2000

J. Biomed. Mater. Res.

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“…Some studies-with a view to improving the limited depth of cure of composite resins-have reported on the effects of filler properties, such as filler size and filler content, on the light transmittance characteristics of composite resins [8][9][10][11][12] . In practice, different commercial composite resins incorporate various filler particles with different shapes and sizes 13) , and the difference in filler properties among products should result in different optical properties and color appearance of the restorations.…”

Section: Introductionmentioning

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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“…Recent improvements in resin composites have been affected by developments in resin monomers (5-7), fillers (8)(9)(10), and filler/matrix coupling agents (11)(12)(13). The mechanical properties as well as optical properties of resin composites have been affected by modifications in filler size, morphology, and components (14)(15)(16).…”

Section: Introductionmentioning

confidence: 99%

EDX fluorescence analysis and SEM observations of resin composites

et al. 2004

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The purpose of this study was to evaluate the filler compositions of recently available light-cured resins. The composition of each resin paste was evaluated using an energy dispersive X-ray fluorescence spectrometer. Scanning electron microscopic observation of the polymerized resin pastes was also conducted. The main component of each resin composite was Si, while the other elements detected were Al, Ba, Sr, Zr, and K. These elementary compositions differed among the resin pastes used. Three different types of filler morphology were observed; splintered, prepolymerized and splintered, and spherical. The results of this study have thus characterized recently developed resin composites based on their filler elements and

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Refractive-index-adjustable Fillers for Visible-light-cured Dental Resin Composites: Preparation of TiO 2-SiO2 Glass Powder by the Sol-gel Process

Cited by 53 publications

References 24 publications

Bioactive bone cement: Effect of surface curing properties on bone-bonding strength

Bioactive bone cement: Effect of surface curing properties on bone-bonding strength

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

EDX fluorescence analysis and SEM observations of resin composites

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