Influence of bleaching regimen and time elapsed on microtensile bond strength of resin composite to enamel

Topçu, Fulya Toksoy; Erdemir, Uğur; Özel, Emre; Tiryaki, Murat; Oktay, Elif Aybala; Yıldız, Esra

doi:10.4103/ccd.ccd_234_17

Cited by 22 publications

(15 citation statements)

References 34 publications

(79 reference statements)

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“…In addition to the studies advocating that restoration delayed by 1 week is sufficient to prevent the decrease in the bonding values after the bleaching process, there are also studies indicating that this period should be 2 or 3 weeks (Akin, Aksakalli, Basciftci, & Demir, 2013; Barbosa, Sasaki, Florio, & Basting, 2008; Bishara, Oonsombat, Soliman, Ajlouni, & Laffoon, 2005; Bittencourt et al, 2010; da Silva Machado et al, 2007; Ghorbanipour, Khoroushi, Mazaheri, Shafiei, & Majdzade, 2011; Türkün & Kaya, 2004; Unlu, Cobankara, & Ozer, 2008). There is a controversy regarding the effect of postponing restorative process for a week on the SBS of bleached teeth but delaying the bonding process for a week after bleaching may not be sufficient to provide ideal adhesion value as indicated in the study of Topcu and Nascimento (Nascimento et al, 2013; Topcu et al, 2017). In the present study, LW‐20 and OB bleaching procedure decreased SBS values compared nonbleached groups ( p < .05), but an increase in SBS values of bleached groups was observed 7 days after bleaching compared to immediately bonded groups ( p < .05; Table 3).…”

Section: Discussionmentioning

confidence: 99%

Effect of diode laser‐assisted bleaching on the bond strength of different adhesive systems to enamel: Interfacial SEM analysis

Özkoçak

Bal

2021

Microscopy Res & Technique

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The aim of this study was to investigate the effectiveness of diode laser‐assisted bleaching on the shear bond strength (SBS) of different adhesive systems to enamel and examine the adhesive enamel interface under scanning electron microscope (SEM). 180 incisor teeth were randomly divided into three bleaching groups: (1) Unbleached control group, (2) Opalescence Boost (OB) 40%, and (3) Diode laser‐assisted LaserWhite20 (LW20) 45%. After bleaching, each group was divided into two subgroups according to waiting time: immediately or 7 days' delay. The six groups were then divided into three subgroups based on the adhesive procedure: Single Bond 2 (SB2), Clearfil SE Bond (CSB), and Clearfil Universal Bond (CUB). After adhesive procedures, composite resin cylinders were bonded to the enamel surfaces. All specimens were subjected to a SBS test after 24 hr of storage in water. Data were analysed using three‐way variance analysis (p < .05). Specimens were examined under a stereomicroscope and SEM. There was a significant difference between the groups bonded immediately and 7 days after bleaching (p < .05). SB2 after 7 days showed the highest SBS values (19.24 ± 2.18), whereas CUB showed the lowest values in both bleaching treatments and control groups (10.84 ± 1.66). SEM analysis of the unbleached specimens revealed long tags and uniform hybrid layer compared OB and LW20 bleaching groups. LW20 and OB bleaching adversely affected SBS to enamel when bonded immediately. Diode laser‐assisted bleaching might be an alternative option due to the short working time but delaying bonding for 7 days after bleaching may not be enough for ideal adhesion. Research Highlights Bleaching agents containing high concentration hydrogen peroxide reduces the enamel bond strength of adhesive systems. Postponing composite restorations for 7 days after bleaching may not be sufficient to achieve ideal adhesion. Diode laser‐assisted bleaching may be preferred as an alternative bleaching method today due to its ability to shorten the operation time and cause minimal morphological changes on the enamel surface.

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Section: Discussionmentioning

confidence: 99%

Effect of diode laser‐assisted bleaching on the bond strength of different adhesive systems to enamel: Interfacial SEM analysis

Özkoçak

Bal

2021

Microscopy Res & Technique

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“…The constant presence of saliva and uoride may minimize changes in the enamel through the deposition of calcium uoride crystals, mitigating the effects of demineralization, prolonging tooth health, and preventing changes that may damage the structure of bleached teeth 25) . Furthermore, extensive studies indicated that the bond strength of bleached teeth with a delay of resin bonding were higher than that of the bleached teeth bonded immediately, which had been attributed to the decomposition of oxygen free radicals accountable for the whitening effect in HP diffusing in enamel and adversely in uencing the penetration of the bonding agent into the tooth surface and then inhibiting the polymerization of resin 26,27) .…”

Section: Discussionmentioning

confidence: 99%

Effect of Resin Infiltration on Bleached Enamel: An In Vitro Evaluation of Micromorphology, Resin Penetration and Microhardness

Wei¹,

Lu²,

Wang³

et al. 2020

Preprint

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Background: Tooth bleaching is a promising aesthetic treatment for shaded teeth; however, demineralized lesions also occur after bleaching, and Icon resin can infiltrate into the demineralized lesions and then improve the color of teeth. This study aims to evaluate the effectiveness of resin infiltration on bleached teeth that are managed with different protocols by assessing the micromorphology of enamel surfaces, the depth of resin penetration and the microhardness of enamel after bleaching and Icon resin infiltration.Methods: A total of 150 noncarious premolars with sound coronal structure, which were extracted for orthodontic purposes, were obtained in this study in three parts: part Ⅰ“micromorphology of enamel surfaces”（n=60）；part II“observation the depth of the resin penetration”（n=30)；part III “Vickers hardness number values”（n=60). Both part Ⅰ and part III were divided into six subgroups. Part II was divided into three subgroups. 10 samples per subgroup. Data were analyzed using SPSS 22.0, Mann-Whitney test.Results: The surface roughness of the teeth increased after bleaching. When etched with 15 % HCl before the resin infiltration, it would result in further increase in roughness, but the surface of the bleached teeth could be as smooth as that of normal teeth after resin infiltration. There was a statistically significant increase in the mean resin penetration depth of the bleached teeth with 5-day delay of resin infiltration over the bleached teeth with resin infiltration immediately (Mann-Whitney test, P<0.05). Otherwise，the VHN values of delayed ones were similar to the normal one.Conclusions: It suggested that Icon resin infiltration treatment should be delayed after tooth bleaching but not performed right after tooth bleaching.

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“…Authors suggested that adhesive restorations should not be placed immediately after 1 week irrespective of the type or concentration of the whitening system used. Composite restorations on bleached enamel surfaces should be placed after at least 2 weeks [6]. On the other hand; bleaching agents (15% carbamide peroxide, 35% hydrogen peroxide and lightactivated 35% hydrogen peroxide) significantly decreased the microhardness of a silorane-based composite resin [7].…”

Section: Influence Of Bleaching Agents On the Mechanical Propertiesmentioning

confidence: 99%

Effects of Different Whitening agents on the Mechanical Properties of Restorative Materials

Mashat¹,

Alsulami²

2019

SJODR

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Dental bleaching procedures are commonly performed to improve esthetics. It can be either in-office professional bleaching techniques or self-administered home-based bleaching agents. These bleaching agents contain variable concentrations of hydrogen or carbamide peroxide that initiates oxidation process mechanism which reduces the extrinsic tooth discoloration. The objective of this review was to discuss the influence of different whitening agents on the mechanical properties of restorative materials. Dentists should be aware of the mechanical properties of restorative materials and ideally prepare the patients free of carious lesions before performing the bleaching procedures. However, bleaching agents with new formulations are introduced that doesn't impact the surface integrity of existing restorations. Moreover, composite restorations on bleached enamel surfaces should be placed after at least 2 weeks. For those patients that require restorative treatment immediately, use of antioxidant agents before bonding procedures on bleached enamel neutralizes completely the deleterious effects of bleaching and increases the bond strength.

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Influence of bleaching regimen and time elapsed on microtensile bond strength of resin composite to enamel

Cited by 22 publications

References 34 publications

Effect of diode laser‐assisted bleaching on the bond strength of different adhesive systems to enamel: Interfacial SEM analysis

Effect of diode laser‐assisted bleaching on the bond strength of different adhesive systems to enamel: Interfacial SEM analysis

Effect of Resin Infiltration on Bleached Enamel: An In Vitro Evaluation of Micromorphology, Resin Penetration and Microhardness

Effects of Different Whitening agents on the Mechanical Properties of Restorative Materials

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