Shear Bond Strength of Two Types of Glass Ionomer to Bleached Dentin: Effect of Delayed Bonding and Antioxidant Agent

Omrani, Ladan Ranjbar; Sabouri, Parastoo; Abbasi, Moslem; Ahmadi, Elham; Ghavam, M

doi:10.2174/1874210601610010720

Cited by 8 publications

(8 citation statements)

References 22 publications

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“…Subsequently, the same research group verified that immersion of enamel bleached with 10% carbamide peroxide in a 10% SA solution for 3 h compensated for the oxidation stress caused by the carbamide peroxide by‐products (29). The results of other studies corroborated the observations that extended applications of the antioxidant based on Vitamin C were beneficial to the bond strength of restorations performed in teeth bleached with both in‐office and at‐home bleaching gels (30–33).…”

Section: Sodium Ascorbate (Sa)supporting

confidence: 76%

Use of antioxidants to restore bond strength after tooth bleaching with peroxides

Olmedo

Kury

Resende

et al. 2021

European J Oral Sciences

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This review compiles the literature on the antioxidants used after tooth bleaching with either low or high‐concentrated carbamide and hydrogen peroxide to recover the bond strength. Antioxidants used in bleached teeth are mainly natural and non‐enzymatic, except for catalase. Commonly, antioxidants are applied to remove any reactive oxygen species (ROS) residues left from bleaching gels, which adversely affect adhesive procedures, such as restorations or orthodontic brackets bonding. Even though sodium ascorbate, the most thoroughly investigated antioxidant, showed the most efficient bond strength recovery at 10% concentration, its performance depends on the type of solution and the application time. Natural extracts, such as proanthocyanidins and green tea, showed satisfactory results in the reversal of bond strength at 5% and 10% concentrations, respectively. Sodium ascorbyl phosphate, α‐tocopherol, and catalase exhibited promising results, but further research is required. The adhesive system type plays an important role in the outcome of enamel bond strength after the antioxidant application. The postponement of either restorations or orthodontic brackets cementation following bleaching procedures seems to be efficiently replaced by antioxidant application prior to bonding procedures. However, the efficacy of using an antioxidant to recover bond strength depends on its type and application time.

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Section: Sodium Ascorbate (Sa)supporting

confidence: 76%

Use of antioxidants to restore bond strength after tooth bleaching with peroxides

Olmedo

Kury

Resende

et al. 2021

European J Oral Sciences

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“…Moreover, according to the results, the delayed cementation affected the bonding strengths of the fiber posts (Table 1). This finding is in accordance with the majority of the studies in the literature (8,11,13). Therefore, FPC procedures should be delayed following tooth bleaching.…”

Section: Idr -Volume 8 Number 1 2018supporting

confidence: 91%

“…Besides the use of antioxidants, delayed bonding or cementation procedures have also been studied; however, there is contradictory information in the literature on this subject. Some authors have advocated the delayed bonding of restorative materials (8,11,13,26), but no positive effect from the delayed bonding on the bonding strength was reported (12). Therefore, 14-day delayed cementation was assessed in this study to clarify this.…”

Section: Discussionmentioning

confidence: 95%

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The Effects of Antioxidant Application and Time Factor on Fiber Post Bonding to Root Dentin after Intracoronal Bleaching

et al. 2018

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Aim: The aim was to evaluate the effects of antioxidant application and delayed cementation on the bond strength of fiber posts after intracoronal bleaching. Methodology: Fifty-five maxillary central incisors were used. Root canals were enlarged using Reciproc system up to R40 instrument. Root canals were irrigated, dried with paper-points, and obturated with gutta-percha and a sealer. In 44 teeth, root canal fillings were removed 2-mm coronally and canal orifices were sealed with glassionomer-cement. A 37% carbamide peroxide (CP) gel was used to bleach the teeth. Five experimental groups were defined (n=11). G1: No bleaching, G2: Immediate fiber post cementation (FPC), G3: Immediate FPC after sodium ascorbate (SA) application, G4: 14-days delayed FPC, G5: 14-days delayed FPC after SA application. Push-out tests were performed. Statistical interpretations were made (α=0.05). Results: There was no significant difference among the groups in apical thirds (p>0.05). However, significant differences were detected among the groups in middle and coronal thirds (p<0.05). Conclusions: The 14-days delayed cementation seems to be a more reliable method than the SA application before FPC procedure after intracoronal bleaching.

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“…The fluoride release potential, chemical bonding to tooth structure, and having a coefficient of thermal expansion close to that of tooth structure are some of the favorable properties of glass ionomer cements [ 9 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of fluoride varnish on glass ionomer microhardness changes in endogenous acid erosion challenge

Moharramkhani

Omrani

Abbasi

et al. 2021

Biomaterial Investigations in Dentistry

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Objective: This study aimed to assess the effect of fluoride varnish on glass ionomer microhardness changes after endogenous acid erosion challenge. Methodology: In this study, 40 conventional glass ionomer (CGI; Fuji IX) and 40 resin-modified glass ionomer (RMGI; Fuji IILC) discs were fabricated and divided into 4 subgroups (n ¼ 10) for immersion in synthetic gastric acid or saliva for 27 h with/without fluoride varnish application. The surface microhardness was measured at baseline and after immersion, and the change in microhardness was calculated. Data were analyzed using analysis of variance and T-test. Results: A reduction in microhardness was noted in all subgroups following immersion. The lowest change in microhardness of both CGI and RMGI occurred in artificial saliva. In CGI groups, the highest reduction in microhardness occurred in synthetic gastric acid with fluoride varnish application, and the reduction was significantly different from that of the CGI group with fluoride varnish application (p value ¼ .01). In RMGI groups, the highest reduction in microhardness was noted in synthetic gastric acid without fluoride varnish application, and the reduction was significantly different from that of the other groups (p value < .05). Conclusions: Exposure to synthetic gastric acid caused a significant reduction in microhardness of RMGI. Varnish application significantly decreased the acid susceptibility of RMGI, but not that of CGI.

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Shear Bond Strength of Two Types of Glass Ionomer to Bleached Dentin: Effect of Delayed Bonding and Antioxidant Agent

Cited by 8 publications

References 22 publications

Use of antioxidants to restore bond strength after tooth bleaching with peroxides

Use of antioxidants to restore bond strength after tooth bleaching with peroxides

The Effects of Antioxidant Application and Time Factor on Fiber Post Bonding to Root Dentin after Intracoronal Bleaching

Effect of fluoride varnish on glass ionomer microhardness changes in endogenous acid erosion challenge

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