Low shrinkage composite resins: influence on sealing ability in unfavorable C-factor cavities

Klautau, Eliza Burlamaqui; Carneiro, Karina Kato; Lobato, Marcelo Figueiredo; Machado, Sissy Maria Mendes; Souza, Mário Honorato Silva e

doi:10.1590/s1806-83242011000100002

Cited by 14 publications

(13 citation statements)

References 20 publications

(29 reference statements)

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“…The composite was inserted into the mold and immediately covered with two glass slides from the top and the bottom. The specimen was polymerized by light, using an LED (Demi LED Light Curing System, Kerr Corp., Orange, USA) light-curing unit with a light intensity of 800 mW/cm 2 , measured with a radiometer for 60 s from both sides. All of the samples were polished with 600, 800, and 1200 grit SiC papers (991A Softlex, Berlin, Germany) to obtain highly polished samples with identical surface roughness (Ra) values.…”

Section: Specimen Preparationmentioning

confidence: 99%

“…[1][2][3] These restorative materials have been introduced in an attempt to overcome the polymerization shrinkage of conventional methacrylate-based composites. A low potential to absorb the dyes from daily nutrition is considered to be an advantage of silorane-based restoratives because of their siloxane backbone, which is responsible for the hydrophobic nature of the restorative material.…”

Section: Introductionmentioning

confidence: 99%

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Addition of silver nanoparticles reduces the wettability of methacrylate and silorane-based composites

Kasraei

Azarsina

2012

Braz. oral res.

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Incorporation of silver nanoparticles into composite resins is recommended for their reported antibacterial properties, but this incorporation can affect the wettability of such materials. Therefore, this study evaluated the effect of nano-silver addition to silorane-based and methacrylate-based composites on their contact angle. Nano-silver particles were added to Z250 (methacrylate-based) and P90 (silorane-based) composites at 0.5% and 1% by weight. The control group had no additions. SEM-EDX analysis was performed to confirm the homogeneity of the nano-silver distribution. Seventy-two composite discs were prepared and standardized to the identical surface roughness values, and then distributed randomly into 6 groups containing 12 samples each (N = 12). Two random samples from each group were observed by atomic force microscopy. Distilled water contact angle measurements were performed for the wettability measurement. Two-way ANOVA, followed by the Tukey-HSD test, with a significance level of 5%, were used for data analysis. It was observed that wettability was significantly different between the composites (p = 0.0001), and that the addition of nano-silver caused a significant reduction in the contact angle (p = 0.0001). Wettability varied depending on the concentration of the nano silver (p = 0.008). Siloranebased composites have a higher contact angle than methacrylate-based composites. Within the limitations of this study, it can be concluded that the addition of 0.5% nano-silver particles to the composites caused a decrease in the contact angle of water.

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Section: Specimen Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Addition of silver nanoparticles reduces the wettability of methacrylate and silorane-based composites

Kasraei

Azarsina

2012

Braz. oral res.

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“…The lack of proper marginal sealing leads to water/saliva infiltration, which can contaminate the mineralized dental tissues involved in the cavity preparation. 16,17 To improve the sealing ability of one-step self-etching adhesives, some authors have suggested the application of an additional layer of hydrophobic material in an attempt to reduce the concentration of hydrophilic monomers to be light cured. 9,[18][19][20][21][22] The importance of studying dentin permeability in relation to the sealing ability of adhesive systems is that, besides bonding the restorative material to the tooth, adhesive systems are responsible for sealing the resin-dentin interface against microleakage and avoiding restorative material debonding, which could compromise the restorations.…”

Section: Declaration Of Interestsmentioning

confidence: 99%

“…9,[18][19][20][21][22] The importance of studying dentin permeability in relation to the sealing ability of adhesive systems is that, besides bonding the restorative material to the tooth, adhesive systems are responsible for sealing the resin-dentin interface against microleakage and avoiding restorative material debonding, which could compromise the restorations. 2,16,17 The objective of this study was to measure fluid flow through the adhesive-dentin interfaces created by eight bonding agents using a permeability device. The null hypothesis was that the mode of application of the adhesives has no effect on dentin permeability.…”

Section: Declaration Of Interestsmentioning

confidence: 99%

Effect of adhesive system and application strategy on reduction of dentin permeability

et al. 2012

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This study evaluated the effect of adhesive systems and application strategies on dentin hydraulic conductance (HC). The buccal enamel was removed from bovine incisors to simulate laminate cavity preparations. After removing the roots and the coronal pulp, the buccal dentin was treated with EDTA solution (0.5 M) for 5 minutes, rinsed, ultrasonicated for 12 minutes and connected to a permeability device. HC of the specimens was measured at 10 psi (n = 5). Permeability was measured before and after bonding procedures using G-Bond (GB), Clearfil Tri-S Bond (CTS), Hybrid Coat (HY), Bond Force (BF), Adper Easy Bond (AEB) Silorane (SI), Clearfil SE Bond (CSE) and Adper Scotchbond Multi-Purpose (SMP) adhesives systems, which were applied following three strategies: 1) according to the manufacturers' instructions; 2) two coats of all-in-one self-etching adhesives (GB, CTS, HY, BF, AEB) or priming step plus two coats of bonding resin for the other systems (SI, CSE and SMP); and 3) a thin layer of a flowable composite applied over one coat of all-in-one self-etching adhesives or primed surface for SI, CSE and SMP adhesives. No significant difference was observed among the application modes concerning their ability to reduce HC. None of the adhesives showed complete sealing (100%) of the bovine tooth dentin. SI exhibited lower HC than SMP, however, they were not significantly different from the other systems. The results suggest that all systems tested result in an HC reduction of more than 90%. The wet bonding technique seemed to be more sensitive for dentin sealing.

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“…Clinical variables include material manipulation and insertion techniques, isolation constraints (usage of dental rubber dam), and adequate knowledge of adhesive and composite resin science and applicable technique. [9][10][11][12][13][14][15][16] Composite resin, used as a posterior restorative, is significantly influenced by polymerization shrinkage with amounts ranging from 1.5% to 5%. 11 Shrinkage causes debonding of the material from tooth structure, precipitating clinical and radiographic sequelae including marginal staining and micro-gap formation (approximately 10 to 20 lm).…”

Section: Introductionmentioning

confidence: 99%

Microleakage of Class I and II Composite Resin Restorations Using a Sonic-resin Placement System

Kalmowicz

Phebus

Owens

et al. 2015

Operative Dentistry

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Low shrinkage composite resins: influence on sealing ability in unfavorable C-factor cavities

Cited by 14 publications

References 20 publications

Addition of silver nanoparticles reduces the wettability of methacrylate and silorane-based composites

Addition of silver nanoparticles reduces the wettability of methacrylate and silorane-based composites

Effect of adhesive system and application strategy on reduction of dentin permeability

Microleakage of Class I and II Composite Resin Restorations Using a Sonic-resin Placement System

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