Influence of thermal stress on marginal integrity of restorative materials

Cenci, Maximiliano Sérgio; Pereira‐Cenci, Tatiana; Donassollo, Tiago Aurélio; Sommer, Laura Reisdörfer; Strapasson, André; Demarco, Flávio Fernando

doi:10.1590/s1678-77572008000200005

Cited by 33 publications

(27 citation statements)

References 13 publications

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“…Furthermore, in a previous study about the influence of thermal stress on the marginal integrity of restorative materials with different adhesive, all thermal cycling regimens, 500 and 1000 cycles, increased leakage in all amalgam restorations and its effect on resin based composite and glass ionomer restorations was only significant when a 60-s dwell time was used (21), justifying the regimen and time dwell used in the present study.…”

Section: Discussionsupporting

confidence: 77%

Repair of amalgam restorations with conventional and bonded amalgam: an in vitro study

Popoff¹,

Gonçalves²,

Ferreira³

et al. 2010

Rev. odonto ciênc. (Online)

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Purpose: This study evaluated microleakage on amalgam restorations repaired by amalgam and bonded amalgam.Methods: Thirty extracted human pre-molars were restored by amalgam. A simulated defect was prepared and assigned to two treatment groups (n=15): G1 -repaired by amalgam (Permite C-SDI); G2 -repaired by bonded amalgam (Caulk 34% Tooth Conditioner Gel -Dentsply + Prime & Bond 2.1 -Dentsply + Permite C-SDI). The teeth were immersed in a 50% silver nitrate solution, thermocycled and then, sectioned longitudinally through the restoration center and examined by 3 examiners using a stereomicroscope. Microleakage was evaluated in a 0-4 scale for dye penetration. Microleakage data were analyzed by Kruskal Wallis and Dunn test.Results: The bonded amalgam technique was significantly the most effective in repair/tooth interfaces sealing (score 0=53.3%, P=0.0012). For repair/restoration interfaces, conventional amalgam was also statistically more effective in the sealing (score 0=86.7%, P<0.001).Conclusion: None of materials eliminated microleakage completely. The use of adhesive systems had significant effect on the ability to seal the repair/tooth interface, however, for repair/restoration interface, it can increase microleakage.

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Section: Discussionsupporting

confidence: 77%

Repair of amalgam restorations with conventional and bonded amalgam: an in vitro study

Popoff¹,

Gonçalves²,

Ferreira³

et al. 2010

Rev. odonto ciênc. (Online)

View full text Add to dashboard Cite

show abstract

“…It would appear that the reduction in flexural properties reported by other studies may be principally the result of exposure to water rather than thermal stress as has been suggested for microleakage. 19 The effects on flexural properties were statistically significant for some materials and thus the null hypothesis is partially rejected. However, the magnitudes of the changes were small, amounting to less than 10% and are unlikely to be clinically significant.…”

Section: Methodsmentioning

confidence: 98%

The effect of clinically relevant thermocycling on the flexural properties of endodontic post materials

Stewardson

Shortall

Marquis

2010

Journal of Dentistry

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“…However, the relationship between caries adjacent to restorations, adhesive/restoration bond strength, and marginal leakage remains relatively unexplored given the existence of few experimental and prospective studies designed to address this aspect 5-7,17 .…”

Section: Introductionmentioning

confidence: 99%

Effect of cariogenic challenge on the stability of dentin bonds

et al. 2014

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ObjectiveThe oral environment is subject to biofilm accumulation and cariogenic challenge, and few studies exist on the effect of these factors on the bond strength of adhesive systems. The aim of this study was to test if the exposure of adhesive interfaces to cariogenic challenge under biofilm accumulation could promote higher degradation than the exposure to biofilm accumulation alone. Material And MethodsFive molars were ground until exposure of medium dentin and then restored (Single Bond 2 and Z250 3M ESPE). The tooth/resin sets were cut to obtain beam-shaped specimens, which were distributed according to the aging conditions (n=20): water for 24 h (control); biofilm under cariogenic challenge for 3, 5 or 10 days; biofilm without cariogenic challenge for 10 days; and water for 3 months. Microcosm biofilms were formed from human saliva and grown in a saliva analogue medium, supplemented or not with sucrose to promote cariogenic challenge. Specimens were tested for microtensile bond strength, and failure modes were classified using light microscopy. Bond strength data were analyzed using ANOVA and failure modes were analyzed using ANOVA on ranks (α=0.05). ResultsNo significant differences in bond strength were detected among the aging methods (P=0.248). The aging period was associated with an increase in the frequency of adhesive failures for the groups aged for 10 days or longer (P<0.001). ConclusionAging leads to a higher prevalence of interfacial adhesive failures, although this effect is not associated with cariogenic challenge or reduction in bond strengths.

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Influence of thermal stress on marginal integrity of restorative materials

Cited by 33 publications

References 13 publications

Repair of amalgam restorations with conventional and bonded amalgam: an in vitro study

Repair of amalgam restorations with conventional and bonded amalgam: an in vitro study

The effect of clinically relevant thermocycling on the flexural properties of endodontic post materials

Effect of cariogenic challenge on the stability of dentin bonds

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