Low viscosity dimethacrylate comonomer compositions [Bis-GMA and CH3Bis-GMA] for novel dental composites; analysis of the network by stray-field MRI, solid-state NMR and DSC &amp; FTIR

Pereira, Sónia; Nunes, Teresa; Kalachandra, S.

doi:10.1016/s0142-9612(02)00094-7

Cited by 76 publications

(49 citation statements)

References 14 publications

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“…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 . The properties of bis-GMA copolymers and composites containing CH 3 bis-GMA ( Figure 1) have been evaluated.…”

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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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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“…Stray-Field Magnetic Resonance Imaging (STRAFI-MRI) has proved its reliability in the study of dental materials [14][15][16][17]. A comparative study of three adhesives (Prime&Bond NT, Single Bond and XENO III) by 1 H STRAFI-MRI is presented.…”

Section: Introductionmentioning

confidence: 99%

Spatially resolved photopolymerization kinetics and oxygen inhibition in dental adhesives

et al. 2005

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“…Low correlation may indicate the possibility of high dependence on the amount of each monomer and their combinations. Among the monomers contained in the tested products (basically, Bis-EMA, Bis-GMA, TEGDMA, and UDMA), TEGDMA showed the lowest viscosity (approximately 0.01 Pa•s) and greatest shrinkage due to low molecular weight (286 g/mol) 23) . Also, it showed the highest water sorption due to hydrophilic nature, however, solubility was the lowest among them.…”

Section: Discussionmentioning

confidence: 99%

“…Also, exceptionally high solubility would be related with much release of uncured residual monomers. Low flow rate of GF and GU would be probably due to the high inclusion of UDMA in addition to their high filler content (UDMA has approximately 10 3 times greater viscosity than TEGDMA) 23) . High solubility of GF among the products can be related with the release of fluoride from LaF 3 (lantanoid fluoride).…”

Section: Discussionmentioning

confidence: 99%

Effect of flowability on the flow rate, polymerization shrinkage, and mass change of flowable composites

Ko²,

Jeong

et al. 2015

Dental Materials Journal

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As a lining or restoration material, flowable composites are popular due to their ease in use and agreeable marginal adaptation of tooth cavity. The purpose of the present study was to evaluate various properties of flowable composites which were claimed to be of high or low flowability by the manufacturers. For the study, twelve flowable composites from six different manufacturers were used. Based on the manufacturers' claim, they were divided into two groups: high or low flowability. The products grouped in high flowability showed significantly higher (p<0.05) flow rate (flow distance), polymerization shrinkage, and microhardness (on the top surface), regardless of light-curing unit, than those grouped in low flowability. On the other hand, water sorption and solubility showed nonsignificantly different values regardless of flowability. Through the study, flow rate had low correlation with microhardness (R<0.23), polymerization shrinkage (R<0.60), and water sorption and solubility (R<0.36) regardless of light-curing unit.

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Low viscosity dimethacrylate comonomer compositions [Bis-GMA and CH3Bis-GMA] for novel dental composites; analysis of the network by stray-field MRI, solid-state NMR and DSC & FTIR

Cited by 76 publications

References 14 publications

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

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

Spatially resolved photopolymerization kinetics and oxygen inhibition in dental adhesives

Effect of flowability on the flow rate, polymerization shrinkage, and mass change of flowable composites

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