Diffusion of Water in Composite Filling Materials

Braden, M.; Causton, E.E.; Clarke, Richard

doi:10.1177/00220345760550050501

Cited by 167 publications

(74 citation statements)

References 1 publication

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“…For dental adhesive resins, their interaction with water causes the latter to diffuse into the matrix, resulting in both hydroscopic expansion and chemical degradation of the composite resin material 27) . As for the amount of water absorbed and the rate of absorption, they are diffusion-controlled 28) and are dependent on several factors, many of which are material-dependent.…”

Section: Effect On the Water Sorption Behavior Of Lingual Retainer Comentioning

confidence: 99%

Effects of thermocycling on the degree of cure of two lingual retainer composites

et al. 2010

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The aim of this study was to evaluate the effects of thermocycling on the degree of cure (DC) and water sorption behavior of two lingual retainer composites. A total of 50 composite specimens, 5 mm diameter and 2 mm height, were prepared using Light Cure Retainer ® (LCR) (Reliance) and Transbond Lingual Retainer ® (TLR) (3M Unitek). After 40-second curing with a halogen light and after 24-hour water storage, the composite specimens were subjected to different thermocycling regimes. Absorbance peaks to monitor the DC were recorded using Fourier transform infrared (FTIR) spectroscopy, while water sorption was calculated in µg/mm 3 . On DC, significant differences among the different thermocycling regimes were observed only for the TLR specimens (p<0.05). On water sorption behavior, an increase in the number of thermal cycles resulted in increased water sorption for both composites, but the statistical differences in these groups were not significant. On the effect of thermocycling up to 20,000 cycles, present findings showed that LCR was less affected than TLR. Further, LCR exhibited higher DC and lower water sorption values than TLR after thermal cycling.

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Section: Effect On the Water Sorption Behavior Of Lingual Retainer Comentioning

confidence: 99%

Effects of thermocycling on the degree of cure of two lingual retainer composites

et al. 2010

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“…In Dentistry, dilution of bis-GMA with the more hydrophilic TEGDMA is known to cause clinical adverse effects, mainly because of the increase in water sorption and polymerization shrinkage 5,6 . To overcome these unwanted effects studies have been directed toward developing low viscosity, hydroxyl free, more hydrophobic bis-GMA analogs such as the propoxylated bis-GMA (2,2-bis(4-(2-methacryloxyprop-1-oxy)phenyl)propane), as a replacement for TEGDMA in bis-GMA mixtures 7,8 .…”

Section: Introductionmentioning

confidence: 99%

Properties of experimental resins based on synthesized propoxylated bis-GMA with different propionaldehyde ratios

et al. 2012

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The effect of different propionaldehyde ratios on the properties of bis-GMA-based comonomers and copolymers diluted with propoxylated bis-GMA (CH 3 bis-GMA) was evaluated. Five experimental comonomers were prepared combining bis-GMA with CH 3 bis-GMA and propionaldehyde at 0, 2, 8, 16, 24 mol%. Light polymerization was effected with the use of 0.2 wt. (%) each of camphorquinone and N,N-dimethyl-p-toluidine. Resin degrees of conversion (%DC) were evaluated by FT-IR spectrophotometry and T g by Differential Scanning Calorimeter. Complex viscosity (η*), the effect of temperature on η*, and Microhardness (H) for dry and wet samples were also determined. Data were analyzed by Student's t-test, one-way ANOVA and Tukey-Kramer test (α = 0.05). The group with 24 mol% additive had a significant increase in %DC and H, and the lowest comonomer T g and η*. No remarkable variation was noted in copolymers T g s. All resins presented Newtonian behavior of viscosity, which linearly decreased with increased temperature. The η* decreased sigmoidally as the additive ratio increased.

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“…According to Braden M et al, 20 uptake of water by a resin composite is a diffusion-controlled process and occurs largely in resin matrix. Diffusion coefficients are generally lower in composites based on difunctionalmethacrylates (Systemp and Protemp) compared with methyl methacrylates (DPI) because of higher cross-linked nature of former leading to low water sorption Turmeric was chosen as the media since it is widely used as an ingredient for cooking in the Bengal.…”

Section: Teamentioning

confidence: 99%

The Colour Stability of the Nanohybrid Composite- Effects of the Immersion Media.

Das¹,

Maity²,

Das³

et al. 2017

IJAR

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Diffusion of Water in Composite Filling Materials

Cited by 167 publications

References 1 publication

Effects of thermocycling on the degree of cure of two lingual retainer composites

Effects of thermocycling on the degree of cure of two lingual retainer composites

Properties of experimental resins based on synthesized propoxylated bis-GMA with different propionaldehyde ratios

The Colour Stability of the Nanohybrid Composite- Effects of the Immersion Media.

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