Durability of Enamel Bonding Using Two-step Self-etch Systems on Ground and Unground Enamel

Loguércio, Alessandro Dourado; Moura, Sandra Kiss; Pellizzaro, Arlete; Dal-Bianco, Karen; Patzlaff, Rafael Tiago; Grande, Rosa Helena Miranda; Reis, Alessandra

doi:10.2341/07-42

Cited by 90 publications

(62 citation statements)

References 33 publications

(45 reference statements)

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“…ompared with the stability of resin-enamel bonds (Loguercio et al, 2008), the durability of resin-dentin bonds is relatively poor (see Carrilho et al, 2005, for review). A 30% to 40% decrease in bond strength has often been observed after 3-6 mos of in vitro aging.…”

Section: Introduction Cmentioning

confidence: 99%

Durability of Resin-Dentin Bonds to Water- vs. Ethanol-saturated Dentin

et al. 2009

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Higher 24-hour resin-dentin bond strengths are created when ethanol is used to replace water during wet bonding. This in vitro study examined if ethanol-wet-bonding can increase the durability of resin-dentin bonds over longer times. Five increasingly hydrophilic experimental resin blends were bonded to acid-etched dentin saturated with water or ethanol. Following composite build-ups, the teeth were reduced into beams for 24-hour microtensile bond strength evaluation, and for water-aging at 37°C for 3, 6, or 12 months before additional bond strength measurements. Although most bonds made to water-saturated dentin did not change over time, those made to ethanol-saturated dentin exhibited higher bond strengths, and none of them fell over time. Decreased collagen fibrillar diameter and increased interfibrillar spacing were seen in hybrid layers created with ethanol-wet-bonding. Increases in bond strength and durability in ethanol-wet-bonding may be due to higher resin uptake and better resin sealing of the collagen matrix, thereby minimizing endogenous collagenolytic activities.KEY WORDs: dentin bonding, durability, hydrophilicity, ethanol.

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Section: Introduction Cmentioning

confidence: 99%

Durability of Resin-Dentin Bonds to Water- vs. Ethanol-saturated Dentin

et al. 2009

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“…Studies revealed that bonding to dentin deteriorates more readily than that to enamel in the long term (De Munck et al, 2003;Loguercio et al, 2008). The hydrolytic and enzymatic breakdown of interfacial collagen is believed to be the leading culprit for such degradation.…”

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confidence: 99%

Addition of Grape Seed Extract Renders Phosphoric Acid a Collagen-stabilizing Etchant

2014

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Previous studies found that grape seed extract (GSE), which is rich in proanthocyanidins, could protect demineralized dentin collagen from collagenolytic activities following clinically relevant treatment. Because of proanthocyanidin's adverse interference to resin polymerization, it was believed that GSE should be applied and then rinsed off in a separate step, which in effect increases the complexity of the bonding procedure. The present study aimed to investigate the feasibility of combining GSE treatment with phosphoric acid etching to address the issue. It is also the first attempt to formulate collagen-cross-linking dental etchants. Based on Fourier-transformed infrared spectroscopy and digestion assay, it was established that in the presence of 20% to 5% phosphoric acid, 30 sec of GSE treatment rendered demineralized dentin collagen inert to bacterial collagenase digestion. Based on this positive result, the simultaneous dentin etching and collagen protecting of GSE-containing phosphoric acid was evaluated on the premise of a 30-second etching time. According to micro-Raman spectroscopy, the formulation containing 20% phosphoric acid was found to lead to overetching. Based on scanning and transmission electronic microscopy, this same formulation exhibited unsynchronized phosphoric acid and GSE penetration. Therefore, addition of GSE did render phosphoric acid a collagen-stabilizing etchant, but the preferable phosphoric acid concentration should be <20%.

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“…Clinically, sealants are applied to fissures with intact, aprismatic enamel instead of the ground, prismatic enamel 15 present in the fissure model used in this investigation. However, some authors 16,17 have reported no difference in the adhesion of etch-and-rinse adhesive systems to ground or unground enamel. The use of ground, prismatic tissue in this study most likely did not influence the results since an etch-and-rinse adhesive system was utilized.…”

Section: Discussionmentioning

confidence: 99%

Impact of adhesive and photoactivation method on sealant integrity and polymer network formation

Borges¹,

Pereira

Alonso

et al. 2012

Braz. oral res.

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We evaluated the influence of photoactivation method and hydrophobic resin (HR) application on the marginal and internal adaptation, hardness (KHN), and crosslink density (CLD) of a resin-based fissure sealant. Model fissures were created in bovine enamel fragments (n = 10) and sealed using one of the following protocols: no adhesive system + photoactivation of the sealant using continuous light (CL), no adhesive system + photoactivation of the sealant using the soft-start method (SS), HR + CL, or HR + SS. Marginal and internal gaps and KHN were assessed after storage in water for 24 h. The CLD was indirectly assessed by repeating the KHN measurement after 24 h of immersion in 100% ethanol. There was no difference among the samples with regard to marginal or internal adaptation. The KHN and CLD were similar for samples cured using either photoactivation method. Use of a hydrophobic resin prior to placement of fissure sealants and curing the sealant using the soft-start method may not provide any positive influence on integrity or crosslink density.

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Durability of Enamel Bonding Using Two-step Self-etch Systems on Ground and Unground Enamel

Cited by 90 publications

References 33 publications

Durability of Resin-Dentin Bonds to Water- vs. Ethanol-saturated Dentin

Durability of Resin-Dentin Bonds to Water- vs. Ethanol-saturated Dentin

Addition of Grape Seed Extract Renders Phosphoric Acid a Collagen-stabilizing Etchant

Impact of adhesive and photoactivation method on sealant integrity and polymer network formation

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