Pull-out bond strength of a self-adhesive resin cement to NaOCl-treated root dentin: effect of antioxidizing agents

Khoroushi, Maryam; Kachuei, Marzieh

doi:10.5395/rde.2014.39.2.95

Cited by 14 publications

(23 citation statements)

References 46 publications

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“…In addition, the present study showed that use of 10% sodium ascorbate for 10 minutes on the dentin treated with 5.25% NaOCl significantly increased the bond strength of both all-in-one adhesive systems. In previous studies, too, the positive and significant effect of the use of 10% sodium ascorbate has been shown in increasing the bond strength of etch-and-rinse ( 6 , 7 ) and self-adhesive cements ( 29 ) to dentin treated with NaOCl. Based on the results of a study by Vongphan et al ( 14 ) the effect of sodium ascorbate on increasing the bond strength was predominantly attributed to chemical reactions.…”

Section: Discussionmentioning

confidence: 93%

Effect of sodium ascorbate on the bond strength of all-in-one adhesive systems to NaOCl-treated dentin

Chaharom¹,

Kimyai²,

Mohammadi³

et al. 2015

J Clin Exp Dent

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Background Ascorbic acid and its salts are low-toxicity products, which are routinely used in food industries as antioxidants. The aim of the present study was to evaluate the effect of 10% sodium ascorbate on the bond strength of two all-in-one adhesive systems to NaOCl-treated dentin. Material and Methods After exposing the dentin on the facial surface of 90 sound human premolars and mounting in an acrylic resin mold, the exposed dentin surfaces were polished with 600-grit SiC paper under running water. Then the samples were randomly divided into 6 groups of 15. Groups 1 and 4 were the controls, in which no surface preparation was carried out. In groups 2 and 5 the dentin surfaces were treated with 5.25% NaOCl alone for 10 minutes and in groups 3 and 6 with 5.25% NaOCl for 10 minutes followed by 10% sodium ascorbate for 10 minutes. Then composite resin cylinders, measuring 2 mm in diameter and 2 mm in height, were bonded on the dentin surfaces in groups 1, 2 and 3 with Clearfil S3 Bond and in groups 4, 5 and 6 with Adper Easy One adhesive systems according to manufacturers’ instructions. The samples were stored in distilled water for 24 hours at 37°C and then thermocycled. Finally, the samples underwent shear bond strength test in a universal testing machine at a strain rate of 1 mm/min. Data were analyzed with two-way ANOVA and post hoc Tukey tests at α=0.05. Results The differences between groups 1 and 2 (P=0.01), 1 and 5 (P=0.003). 1 and 6 (P=0.03) and 4 and 5 (P=0.03) were statistically significant. Two-by-two comparisons did not reveal any significant difference between other groups (P>0.05). Conclusions Use of 10% sodium ascorbate for 10 minutes restored the decreased bond strength of the adhesive systems to that of the control groups. Key words:Sodium ascorbate, adhesive systems, all-in-one, bond strength, sodium hypochlorite.

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Section: Discussionmentioning

confidence: 93%

Effect of sodium ascorbate on the bond strength of all-in-one adhesive systems to NaOCl-treated dentin

Chaharom¹,

Kimyai²,

Mohammadi³

et al. 2015

J Clin Exp Dent

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“… 18 , 19 The effects of Rosmarinic acid (RA) and hesperidin (HES) as antioxidants for post surface treatment have been investigated in different studies. 20 , 21 RA contains p-toluenesulfinic acid sodium salt and it was shown that application of RA for 30 seconds can improve the bond strength of resin adhesives to NaOCl-treated dentin. 22 …”

Section: Introductionmentioning

confidence: 99%

Effect of antioxidants on push-out bond strength of hydrogen peroxide treated glass fiber posts bonded with two types of resin cement

Khoroushi

Mazaheri²,

Tarighi

et al. 2014

Restor Dent Endod

Self Cite

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ObjectivesHydrogen peroxide (H2O2) surface treatment of fiber posts has been reported to increase bond strength of fiber posts to resin cements. However, residual oxygen radicals might jeopardize the bonding procedure. This study examined the effect of three antioxidant agents on the bond strength of fiber posts to conventional and self-adhesive resin cements.Materials and MethodsPost spaces were prepared in forty human maxillary second premolars. Posts were divided into five groups of 8 each: G1 (control), no pre-treatment; G2, 10% H2O2 pre-treatment; G3, G4 and G5. After H2O2 application, Hesperidin (HES), Sodium Ascorbate (SA) or Rosmarinic acid (RA) was applied on each group respectively. In each group four posts were cemented with Duo-Link conventional resin cement and the others with self-adhesive BisCem cement. Push-out test was performed and data were analyzed using 2-way ANOVA and tukey's post-hoc test (α = 0.05).ResultsThere was a statistically significant interaction between the cement type and post surface treatment on push-out bond strength of fiber posts (p < 0.001, F = 16). Also it was shown that different posts' surface treatments significantly affect the push-out bond strength of fiber posts (p = 0.001). H2O2 treated posts (G2) and control posts (G1) cemented with Duo-link showed the highest (15.96 ± 5.07MPa) and lowest bond strengths (6.79 ± 3.94) respectively.ConclusionsIt was concluded that H2O2 surface treatment might enhance the bond strength of fiber posts cemented with conventional resin cements. The effect of antioxidants as post's surface treatment agents depends on the characteristics of resin cements used for bonding procedure.

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“…Others have reported that the diameters of the "punch pins" in all tests were in accordance with the size of samples and induced a load from apical to the coronal direction on the post without applying any pressure over cement and/or over dentin [85,146,[149][150][151][152][153][154][155][156][157][158]. All ensured that the force was properly applied.…”

Section: Load Typementioning

confidence: 98%

Test methods for bond strength of glass fiber posts to dentin: A review

Santos

Carlo

Barros

2016

The Journal of Adhesion

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In this paper, a review of the test methods for bond strength of glass fiber posts to dentin is presented. The main variables that influence the bond strength tests are related to substrate, to specimen properties, specimen preparation and test methodology. The impact of these variables on the test outcome is analyzed. The search was performed on studies published between 2007 and 2015. Most of the tests carried out, in the literature, were the push-out (75%), pull-out (13%) and microtensile (11,9%) tests, showing an inversion compared to the results found in studies published between 2005 and 2010, when push-out test was used in a proportion of 2% and microtensile test in a proportion of 67%. The push-out test emerged as a practical tool for evaluating the interfacial shear strength between fiber post and root canal walls.Fiber posts have been widely used in endodontically treated teeth in the last years. One of the advantages of using fiber posts is the use of adhesive bonding technique, which requires minimal intervention on the dentin surface. In addition, fiber posts have an elastic modulus similar to dentin, resulting in more homogeneous stress distribution along the root canal system. Thus, fiber post minimizes the risk of root fractures and lead to more favorable failure mode than metallic posts.The durability of restored endodontically treated teeth depends on many basic factors [1] including the amount of remaining coronal structure, restorative procedures and the materials used [2,3], which appear to be the key factors affecting the longevity of the tooth. Although low percentage failure rates and satisfactory clinical performance have been reported when fiber posts were used [4, 5, 6], pulpless teeth are still considered more vulnerable and susceptible to fracture in comparison to vital teeth [7].The clinical success of a recovery depends on the quality and durability of the bonding joint between the fiber post and the tooth structure. Therefore, it is fundamental that the test method used to evaluate the bond strength provides accurate information on the materials performance [8]. Reviews published in the decades of 1990 and 2010 [9-13] showed a relationship between the conditions for adhesion of post to the substrate, including cement application mode, post pretreatment and sample storage conditions, but only few discussed the variables that influence the bond strength tests. Downloaded by [Florida Atlantic University] at 16:14 06 June 2016 A c c e p t e d M a n u s c r i p t 3The bond strength tests might be influenced by many variables which include: the specimen design, the size of the adhesion surface area, the loading configuration and the type of materials [2,[16][17][18]. The high modulus of elasticity of a bonded composite, the thickness of the adhesive layer between the dentin of the root canal and the post, the format of post and the canal, among others, are variables that influence the stress distribution along the bonded interface [3,18,19] and consequently the outcome of the bond streng...

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Pull-out bond strength of a self-adhesive resin cement to NaOCl-treated root dentin: effect of antioxidizing agents

Cited by 14 publications

References 46 publications

Effect of sodium ascorbate on the bond strength of all-in-one adhesive systems to NaOCl-treated dentin

Effect of sodium ascorbate on the bond strength of all-in-one adhesive systems to NaOCl-treated dentin

Effect of antioxidants on push-out bond strength of hydrogen peroxide treated glass fiber posts bonded with two types of resin cement

Test methods for bond strength of glass fiber posts to dentin: A review

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