The Influence of Time and Cement Type on Push-Out Bond Strength of Fiber Posts to Root Dentin

Leme, A.A.; Coutinho, Margareth; Insaurralde, A F; Scaffa, Polliana Mendes Cándia; Silva, L M da

doi:10.2341/10-404-l

Cited by 31 publications

(26 citation statements)

References 30 publications

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“…The high BS values observed for U100 in this study and in others 1,[7][8][9]28,[35][36][37] can be attributed to the chemical interaction between monomer acidic phosphate groups and dentin/enamel hydroxyapatite 17 and to low shrinkage of the material, 38,39 leading to closer contact of the resin cement with the root canal walls and higher frictional resistance. 40,41 Unfortunately, there is no consensus in the literature with regard to the superiority of this material when compared with conventional bonding strategies.…”

Section: Discussionsupporting

confidence: 52%

Effect of Operator Experience on the Outcome of Fiber Post Cementation With Different Resin Cements

Gomes¹,

Gómes²,

Reis³

et al. 2013

Operative Dentistry

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RelyX U100 (commercially available outside Brazil as RelyX Unicem) was shown not to be affected by the operator's experience and therefore seems to be more suitable for use by less experienced clinicians. Materials and Methods: The roots of 48 extracted human maxillary central incisors were prepared and divided into six groups (n=8), according to combination of the above factors. Glass fiber posts were cemented in accordance with the instructions of the manufacturer of each cementation system. After water storage at 378C for one week, the roots were crosssectioned into six 1-mm thick slices and the push-out test was performed (0.5 mm/min). Data were statistically analyzed by two-way analysis of variance and Tukey tests (a=0.05). The BS results obtained by dentist and student , 2013, 38-5, 555-564 for each cementation system were compared using the Student t-test (a=0.05).Results: Higher BS means were observed for the expert operators, irrespective of the cementation system used (p=0.006). RelyX U100 showed the highest bond strength, but it did not differ from SBMP + RelyX ARC. The Student t-test revealed that only RelyX U100 was not affected by the operator's experience.Conclusion: Within the limitations of this in vitro study, it can be concluded that the selfadhesive cement RelyX U100 showed the highest bond strength to the root canal in the student's group, and its performance was not affected by the operator's experience.

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Section: Discussionsupporting

confidence: 52%

Effect of Operator Experience on the Outcome of Fiber Post Cementation With Different Resin Cements

Gomes¹,

Gómes²,

Reis³

et al. 2013

Operative Dentistry

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show abstract

“…Then, according to our results, the cervical third had higher bond strength values than the middle third, when compared to resin cements. These results differ from previous studies (17,23) that there were no differences among to the thirds. The differences may result from the comparative analysis between the cervical and middle third, since the apical third was not included in this study.…”

Section: Discussioncontrasting

confidence: 99%

Influence of Zingiber officinale Extract on Push-Out Bond Strength of Glass-Fiber Post

et al. 2018

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The aim of this study was to evaluate in vitro the influence of 20% glycolic ginger extract on the bond strength of glass-fiber post cemented with etch-and-rinse or self-etching resin cement. Forty-eight bovine roots were standardized (17±0.5 mm) and randomly divided into two groups, according to irrigant used during biomechanical preparation: NaOCl: 1% sodium hypochlorite and GEN: 20% glycolic ginger extract. Root canal was prepared and randomly assigned to one of two subgroups (n=12), according to luting protocol: self-etching (RelyX U200) and etch-and-rinse (RelyX ARC). After 48 h, the roots were sectioned perpendicularly (4 in cervical third and 3 in middle third) and submitted to push-out bond strength test (50 kgf load cell, 1.0 mm/min). Failure mode was analyzed in SEM and stereomicroscopy. Data were analyzed by three-way ANOVA and Tukey tests (p<0.05). ANOVA revealed that there were no significant differences between U200 (2.01±0.17)B and ARC (1.93±0.12)B in GEN group, and at the cervical third for both irrigants, 2.69±0.16A and 2.54±0.17A, respectively. Middle third showed lower bond strength than cervical third, regardless the irrigant. Overall, the cervical third regardless the irrigant employed and the association between NaOCl and ARC, presented better adhesive performance. Influence of Zingiber officinale E x t r a c t o n P u s h -O u t B o n d S t r e n g t h o f G l a s s -F i b e r Po s t

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“…The literature presents conflicting results concerning the efficacy of self-adhesive cements versus conventional dual-polymerized ones [6,8,[12][13][14]. However, in general, using an etch-and-rinse approach for conditioning the intraradicular dentin presented better results for both selfadhesive [6,8,[12][13][14] and conventional resins [5,9,10,16,17], while in some studies no significant difference was found between them [6,17]. It has to ne noted that these studies evaluated bond strength results only 24 h after cementation and/or following some type of aging at the bonded interface such as water storage or thermo and/or mechanical cycling.…”

Section: Discussionmentioning

confidence: 99%

“…It has to ne noted that these studies evaluated bond strength results only 24 h after cementation and/or following some type of aging at the bonded interface such as water storage or thermo and/or mechanical cycling. Moreover, the core build up was not performed prior to the push-out test [5,10,12,14,17] or when core applied no information was provided whether the core was prepared immediately or after some time [6,8,13]. Previous studies suggest that clinical procedures such as occlusal adjustment or core preparation prior to complete setting time of the resin cement (24 h) could generate stress at the resin cement interfaces, reducing bond strength results [23].…”

Section: Discussionmentioning

confidence: 99%

“…Thus, laboratory studies evaluated different parameters in order to obtain a reliable adhesion between resin cement and dentin through which the lifespan of reconstructions on endodontically treated teeth restored FRC and core could be prolonged [1]. The effect of canal preparation [4], hybridization methods of root canal dentin [5], resin cement [5][6][7][8][9][10][11][12][13][14][15][16][17], polymerization methods for the resin cement [18], and post configuration [6,19] have been studied and deemed to show effect on the bond strength of FRC posts. In fact, according to the clinical workflow, immediately after post cementation, the core is built up and it is prepared with rotating hand-pieces, which may cause torque forces to the newly cemented post until final polymerization reached.…”

Section: Introductionmentioning

confidence: 99%

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Effect of timing for core preparation, luting cement type and root level on adhesion of fiber posts to intraradicular dentin

Sukuroglu

Aktaş

Askın

et al. 2015

Journal of Adhesion Science and Technology

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This study assessed the effect of timing of core preparation and luting cement on adhesion of fiber reinforced composite (FRC) posts on different levels of intraradicular dentin when cemented with either conventional dual-polymerized or self-adhesive resin cement.Single-rooted human teeth (N=80) were endodontically treated and randomly divided into 2 groups (n=40) according to resin cement: a) Conventional dual resin cement (Variolink II, V) or b) Self-adhesive resin cement (RelyX U200, R). They were further divided into two subgroups according to timing of core preparation (n=20): a) immediate (i) or b) delayed (d). FRC posts (Cytec Blanco) were cemented and the roots were sliced into discs at the coronal, middle and apical levels. Push-out tests were then performed in a Universal Testing Machine (1 mm/min).Data (MPa) were analyzed using three-way ANOVA and Tukey`s tests considering the factors "core preparation time", "luting cement" and "root level" (α=0.05). Type of luting cement (p<0.001), time of core preparation (p<0.001) and root level (p<0.001) significantly affected the bond strength results. R cement was more significantly affected by core preparation time (Ri: 2.91±1.1; Rd: 4.83±1.68) compared to V cement (Vi: 2.92±1.63; Vd: 2.65±1.6) (p<0.05). Coronal region demonstrated significantly higher bond strength values than those of middle and apical third in all groups (coronal: 4±1.9; middle: 3.1±1.4; apical: 2.4±1.1) (p<0.05). Adhesive failure between cement and dentin was the most frequent (64%) followed by adhesive failure between cement and post (18%). Delayed core preparation can improve bond strength of FRC posts to intraradicular dentin when cemented with self-adhesive cement compared to conventional dual polymerized resin cement.

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The Influence of Time and Cement Type on Push-Out Bond Strength of Fiber Posts to Root Dentin

Cited by 31 publications

References 30 publications

Effect of Operator Experience on the Outcome of Fiber Post Cementation With Different Resin Cements

Effect of Operator Experience on the Outcome of Fiber Post Cementation With Different Resin Cements

Influence of Zingiber officinale Extract on Push-Out Bond Strength of Glass-Fiber Post

Effect of timing for core preparation, luting cement type and root level on adhesion of fiber posts to intraradicular dentin

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