Mechanical properties and degree of conversion of etch-and-rinse and self-etch adhesive systems cured by a quartz tungsten halogen lamp and a light-emitting diode

Gaglianone, Lívia Aguilera; Lima, Adriano Fonseca; Gonçalves, Luciano de Souza; Cavalcanti, Andréa Nóbrega; Aguiar, Flávio Henrique Baggio; Marchi, Giselle Maria

doi:10.1016/j.jmbbm.2012.01.018

Cited by 52 publications

(41 citation statements)

References 21 publications

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“…Along with the elution of the antibacterial agent, the release of unreacted monomers due to a lower degree of conversion could negatively affect adhesive properties and stimulate polymer degradation (23). In this study, all groups achieved more than 50% degree of conversion, corroborating previous studies (24). The adhesive resins with 2.5% wt and 5% wt of triazine addition showed a higher initial Knoop hardness.…”

Section: Discussionsupporting

confidence: 86%

Triazine Compound as Copolymerized Antibacterial Agent in Adhesive Resins

et al. 2017

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The aim of this study was to formulate and evaluate an experimental adhesive resin with the addition of 1,3,5-triacryloylhexahydro-1,3,5-triazine at different concentrations. Experimental adhesive resins were obtained by mixing 50% wt bisphenol A glycol dimethacrylate (BisGMA), 25% wt triethylene glycol dimethacrylate (TEGDMA), 25% wt 2-hydroxyethyl methacrylate (HEMA) and photoinitiator system. The triazine compound was added in 1, 2.5 and 5% wt to a base adhesive resin and one group remained with no triazine as control group. The experimental adhesive resins were analyzed for antibacterial activity (n=3), degree of conversion (n=3) and softening in solvent (n=3). Data distribution was evaluated by Kolmogorov-Smirnov test, paired t test, one-way ANOVA and Tukey's with a 0.05 level of significance. All groups with added triazine compound showed antibacterial activity against Streptococcus mutans (p<0.05). All groups achieved more than 70% degree of conversion, but there was no difference in this chemical property (p>0.05). The initial Knoop hardness was higher in 2.5 and 5% wt groups (p<0.05) and both groups present lower percentage variation of Knoop hardness after solvent degradation. The present study formulated an antibacterial adhesive resin with a non-releasing agent able to copolymerize with the comonomeric blend, improving the restorative material's properties.

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Section: Discussionsupporting

confidence: 86%

Triazine Compound as Copolymerized Antibacterial Agent in Adhesive Resins

et al. 2017

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“…LS adhesive resin is a self-etch adhesive system that presents a hydrophilic photo-polymerized primer. This characteristic can possibly explain the obtained results since the interlocking with the grounded surface was achieved mainly by an agent with significantly reduced mechanical properties compared to the hydrophobic agent of the same system [19]. Similar results were observed in a previous study using only the primer of LS compared to repairs using only the adhesive resin of this system [10].…”

Section: Discussionsupporting

confidence: 87%

Effect of surface conditioning methods, adhesive systems and resin composite on repair strength of dimethacrylate and silorane resin composites

Lima

Leite

Palialol

et al. 2016

Journal of Adhesion Science and Technology

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“…Although, there have been several controversies regarding the effect of light attenuation on bond strength [32,39], many studies have shown that the improvement in mechanical behaviour [51], decrease in water sorption and solubility [52] and reduction in the bonding interfaces permeability [20,53] were directly linked to the higher DC% of the different adhesive resinss. Nevertheless, further studies should be conducted to evaluate the effect of increasing light source distance or the chemical polymerization mode of the dual-poylmerized self-etch adhesives on the bond strength of both chemical-and dual-polymerized resin composites.…”

Section: Discussionmentioning

confidence: 99%

Effect of polymerization protocol on the degree of conversion of photo- and dual-polymerized self-etch adhesives

Moharam¹,

Botros

El-Askary

et al. 2015

Journal of Adhesion Science and Technology

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(2016). Effect of polymerization protocol on the degree of conversion of photo-and dual-polymerized self-etch adhesives. Journal of Adhesion Science and Technology, 30(3) Bond Universal DC, 3M ESPE) were tested. All adhesives were applied on potassium bromide pellets (KBr) following the manufacturer's instructions. The KBr pellets were divided into 10 experimental groups for the photo-polymerized adhesives and 12 experimental groups for the dual-polymerized adhesives according to the two levels of the study, Level 1: Polymerization protocol and Level 2: Adhesive system. For the photo-polymerized adhesives, the adhesives were polymerized either at 1 mm or 10 mm from the KBr pellets. For the photo-polymerized adhesives, the adhesives were photo-polymerized either at 1 mm or 10 mm distance or polymerized chemically. The DC% of the unpolymerized and polymerized adhesives was assessed using Fourier transform infrared spectroscopy (FTIR). Data were analyzed using two-Way ANOVA to evaluate the effect of polymerization protocol, adhesive system and their interaction on the DC% of the self-etch adhesives. For the photo-polymerized and dual-polymerized adhesives, one-Way ANOVA and Tukey HSD post hoc test was used to evaluate the effect of adhesive system within each polymerization protocol and the effect of polymerization protocol within each adhesive for the dual-polymerized adhesives (p=0.05). Student t-test was used to compare the effect of polymerization distances within each photo-polymerized adhesive. For both photo-and dual-polymerized adhesives, the polymerization protocol and adhesive system had a significant effect on the DC (p=0.000). The interaction between the two factors (polymerization protocol and adhesive system) revealed also a significant effect on the DC% of the different 3 adhesives (p=0.000). Polymerization distance of 1 mm showed significantly higher DC% compared to 10 mm distance. When the dual-polymerized adhesives were left to set chemically, they showed the lowest DC% among all polymerization protocols. DC varied depending on the chemical composition of the self-etch adhesives. The tip of the polymerization device should be positioned as close as possible to the surface to achieve higher DC% of the tested adhesives. Photo-polymerization of the dualpolymerized self-etch adhesives is a mandatory step to improve their DC.

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Mechanical properties and degree of conversion of etch-and-rinse and self-etch adhesive systems cured by a quartz tungsten halogen lamp and a light-emitting diode

Cited by 52 publications

References 21 publications

Triazine Compound as Copolymerized Antibacterial Agent in Adhesive Resins

Triazine Compound as Copolymerized Antibacterial Agent in Adhesive Resins

Effect of surface conditioning methods, adhesive systems and resin composite on repair strength of dimethacrylate and silorane resin composites

Effect of polymerization protocol on the degree of conversion of photo- and dual-polymerized self-etch adhesives

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