Water movement across bonded dentin - too much of a good thing

Tay, Franklin R.; Carvalho, Ricardo Marins de; Pashley, David H.

doi:10.1590/s1678-77572004000500003

Cited by 29 publications

(48 citation statements)

References 25 publications

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“…12 The study by Pushpa and Suresh 18 confirmed that the marginal microleakage of composite restorations bonded with one-step self-etch adhesives is closely related to the hydrophilicity of adhesive layer, which is able to generate structure defects in the bonding interface. 19 In this case, the leakage observed may be created mainly by the structure defects within the bonding interface and therefore shows no correlation to the polymerization contraction of the restorations. 20 Accordingly, it is likely that the leakage in the present study demonstrates more action of the structure defects and less action of polymerization contraction of the restoration.…”

Section: Discussionmentioning

confidence: 86%

Detection of Marginal Leakage of Class V Restorations In Vitro by Micro–Computed Tomography

Zhao

et al. 2014

Operative Dentistry

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Micro-computed tomography can provide in vitro nondestructive detection of leakage around a composite restoration to display entire three dimensional dentin leakage patterns with accuracy comparable to that of the conventional dye-penetration method. SUMMARYThis in vitro study evaluated the efficacy of micro-computed tomography (CT) in marginal leakage detection of Class V restorations. Standardized Class V preparations with cervical margins in dentin and occlusal margins in enamel were made in 20 extracted human molars and restored with dental bonding agents and resin composite. All teeth were then immersed in 50% ammoniacal silver nitrate solution for 12 hours, followed by a developing solution for eight hours. Each restoration was scanned by micro-CT, the depth of marginal silver leakage in the central scanning section was measured, and the three-dimensional images of the silver leakage around each restoration were reconstructed. Afterward, all restorations were cut through the center and examined for leakage depth using a microscope. The silver leakage depth of each restoration obtained by the micro-CT and the microscope were compared for equivalency. The silver leakage depth in cervical walls observed by micro-CT and microscope showed no significant difference; however, in certain cases the judgment of leakage depth in the occlusal wall in micro-CT image was affected by adjacent enamel structure, providing less leakage depth than was observed with the microscope (p,0.01). Micro-CT displayed the threedimensional image of the leakage around the Class V restorations with clear borders only in the dentin region. It can be concluded that micro-CT can detect nondestructively the leakage around a resin composite restoration in two and three dimensions, with accuracy comparable to that of the conventional microscope method in the dentin region but with inferior accuracy in the enamel region.

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Section: Discussionmentioning

confidence: 86%

Detection of Marginal Leakage of Class V Restorations In Vitro by Micro–Computed Tomography

Zhao

et al. 2014

Operative Dentistry

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“…As the amount of free radicals available decreases, a hybrid layer with a low degree of conversion is generated, which impairs adhesion. The fact that, in this study, the dentin was hybridized with a hydrophobic conventional 3-step adhesive system, which provides an impermeable barrier (TAY et al, 2004), might explain why the Provy sample did not differ from the Control sample. That is, this procedure might have prevented contact between the water in the dentinal tubules and the eugenol-containing temporary cement.…”

Section: Discussionmentioning

confidence: 83%

Effect of temporary cements on the bond strength of a resin cement to a pre-hybridized dentin

Lima¹,

Marciel²,

Correia³

et al. 2017

Biosci. J.

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This study assessed the bond strength of a resin cement when Immediate Sealed Dentin (ISD) was contaminated by different temporary cements applying a microshear test. Forty-eight fragments of third molar crowns were mounted in acrylic resin and worn until the dentin was exposed. The substrates were sealed with a 3-step conventional adhesive system and divided into four groups (n=12): Control (without temporary cement) and three groups that used different temporary cements -Provy, RelyX Temp NE, and Provitemp. The temporary cements were removed after 7 days of storage. Resin cement RelyX ARC was applied to the contaminated substrates. Microshear bond strength was evaluated using a universal testing machine (0.5 mm/min). Data was analyzed with ANOVA and a Dunnett post-hoc test (p<0.05). Additionally, three samples from each group were prepared for scanning electron microscope analysis. Means and standard deviations of microshear bond strength (MPa) were 17.96±1.65, 16.70±1.43, 20.43±1.30 and 33.75±4.72 for Control, Provy, RelyX Temp, and Provitemp, respectively. Statistically significant difference was observed between the Control and Provitemp samples (p=0.0002). Adhesive failures were dominant (50%), followed by cohesive failures with cement (26%), and cohesive failures with dentin (24%). Residues of Provy and Provitemp were observed on the sealed dentin. Provitemp temporary cement sealing increased the microshear bond strength of the resin cement on dentin treated with IDS.

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“…Dyad, Kerr, Orange, CA, USA). Several classifications have been proposed for adhesive systems 9,45 . One of the more commonly used is the classification by generation 9 .…”

Section: Discussionmentioning

confidence: 99%

“…Several classifications have been proposed for adhesive systems 9,45 . One of the more commonly used is the classification by generation 9 . This standard does not appear to be the most viable as it implies the notion that the state-of-the-art adhesives have superior performance over adhesives of prior generations.…”

Section: Discussionmentioning

confidence: 99%

Clinical application of adhesive systems - a critical review: biomimetic approach

Ricci

Lucas

Piveta

et al. 2015

RGO, Rev. Gaúch. Odontol.

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RESUMOAs diversas funções e aplicabilidades clínicas dos sistemas adesivos os tornaram parte fundamental da terapêutica restauradora. O desafio maior destes sistemas está em prover qualificada adesão aos diferentes tecidos uma vez que estes são muito distintos em sua constituição. Para que essa escolha seja feita corretamente o dentista deve conhecer a origem, composição, mecanismo de ação e modo de aplicação de cada sistema. Os produtos disponíveis e o estado técnico, alcançados atualmente, tem possibilitado aos clínicos o desenvolvimento de uma filosofia de máxima conservação tecidual, estética otimizada, atualização de condutas e conceitos bem como função plena do elemento dental restaurado compatíveis com uma filosofia biomimética. A literatura vigente apresenta superioridade de resultados com adesivos de condicionamento total de três etapas, uso de clorexidina como fator de aumento da longevidade e perspectivas futuras que incluem trabalhos com o uso de etanol, agentes inativadores enzimas liberadas no processo adesivo e a ação de agentes que atuem na malha dentinária.

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Water movement across bonded dentin - too much of a good thing

Cited by 29 publications

References 25 publications

Detection of Marginal Leakage of Class V Restorations In Vitro by Micro–Computed Tomography

Detection of Marginal Leakage of Class V Restorations In Vitro by Micro–Computed Tomography

Effect of temporary cements on the bond strength of a resin cement to a pre-hybridized dentin

Clinical application of adhesive systems - a critical review: biomimetic approach

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