Comparison of regional bond strength in root thirds among fiber‐reinforced posts luted with different cements

Mauricio, Paolo Joâo B. T. de Durâo; González-López, Santiago; Aguilar-Mendoza, José A.; Félix, Sergio; González-Rodrı́guez, Marı́a Paloma

doi:10.1002/jbm.b.30805

Cited by 62 publications

(63 citation statements)

References 43 publications

(61 reference statements)

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“…Despite the methodological differences, previous studies (2,3,20,(22)(23)(24) have also verified higher bond strength in the coronal root canal region. Analysis of the failure modes confirm the lower values of adhesion in the apical region, with predominance of adhesive and mixed-type failures in this region.…”

Section: Discussionmentioning

confidence: 91%

Effect of light-activation with different light-curing units and time intervals on resin cement bond strength to intraradicular dentin

et al. 2012

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The aim of this study was to assess the bond strength of a resin cement to intraradicular dentin varying the light-curing unit and the moment at which the light was applied. Post spaces of endodontically treated canines were prepared. The roots were distributed into 6 groups (n=10) according to the light-curing unit and the moment of light exposure: I) Quartz tungsten halogen-600 mW/cm² (QTH) + immediate light activation (t0); II) QTH + light activation after 10 min (t10); III) Light-emitting diodes (LED)-800 mW/cm² (LED-800)+ t0; IV) LED-800 + t10; V) LED-1,500 mW/cm² (LED-1500)+ t0; VI) LED-1500 + t10. After post cementation, slices from coronal, middle and apical post/root regions were submitted to the push-out test and failure evaluation. It was verified that LED-800 (4.40 ± 3.00 MPa) and LED-1500 (4.67 ± 3.04 MPa) provided bond strength statistically superior to QTH (3.13 ± 1.76 MPa) (p<0.05), and did not differ from each other (p>0.05). There was no significant difference between t0 and t10 (p>0.05). Coronal post/root region (4.75 ± 3.10 MPa) presented significantly higher bond strength than the apical (3.32 ± 2.30 MPa) (p<0.05) and middle regions (4.14 ± 2.99 MPa) showed intermediate values. Adhesive failures were predominant when using QTH. Adhesive and mixed failures occurred more frequently in the apical region. Higher adhesion of the resin cement to intraradicular dentin was observed in the coronal region with LED light-activation, regardless of the moment of light exposure.

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Section: Discussionmentioning

confidence: 91%

Effect of light-activation with different light-curing units and time intervals on resin cement bond strength to intraradicular dentin

et al. 2012

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“…Previous studies also showed highest bond strength to cervical third. 9,22 Other factors, such as difficult access to the apical region and possible limitations of cement flow may be assigned for this result, 12,22 as well as the decreasing effectiveness of light curing at regions farther from the light source, since that the performance of the dual-cured resin cements improve after setting by light and chemical activation; demonstrating the importance of light curing. 12,22,23 No significant difference was found between the root thirds of fiber posts cemented with self-adhesive cements.…”

Section: Resultsmentioning

confidence: 85%

“…3 They distribute the occlusal stress more uniformly along the root, leading to lower occurrence of root fractures. 4 However, the cementation of GFP is a sensitive technique and some variables may impair the bond between cement and dentin, such as the several materials used for endodontic treatment, [5][6][7] root canal morphological variations, 8,9 control of dentin moisture, formation of bubbles in the resin cement and difficult curing of the resin cement at the middle and apical root thirds. [5][6][7][8][9][10][11][12] Therefore, a successful treatment requires good bonding between…”

Section: Introductionmentioning

confidence: 99%

Influence of Relining Post on the Bond Strength of Resin Cements

et al. 2015

The Journal of Contemporary Dental Practice

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This study evaluated the influence of relining fiber posts on the bond strength (BS) of resin cements in the root canal. Forty bovine teeth were divided in four groups (n = 10): G1 (ARC)-fiber post cemented with resin cement RelyX ARC; G2 (ARC+Z350)-relined fiber post cemented with RelyX ARC; G3 (U200)-fiber post cemented with self-adhesive cement RelyX U200; G4 (U200+Z350)-relined fiber post cemented with RelyX U200. The roots were sectioned in six 1.2-mm slices and the push-out test was performed. Data were analyzed by three-way analysis of variance (ANOVA), and Tukey's test (α = 0.05). For the conventional resin cement, there was no significant difference between groups G1-ARC (15.5 ± 3.8) and G2-ARC+Z350 (16.1 ± 4.5). For the self-adhesive cement, the results revealed higher BS values for relined posts G4-U200 + Z350 (19.9 ± 7.9) as compared to non-relined posts G3-U200 (14.4 ± 4.5). For both cements, in groups of relined posts, the apical and the cervical thirds presented similar BS. Relining enhances the performance of the self-adhesive resin cement, and the interaction between relining and root third influences the BS to the conventional resin cement.

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“…This difference may be associated with the cement used in this study (RelyX U100), which has high viscosity and, therefore, does not reach the apical third in some cases [38,39]. Furthermore, an adequate polymerization is necessary to achieve satisfactory mechanical properties.…”

Section: Discussionmentioning

confidence: 97%

Effect of internal bleaching agents on the bond strength of glass fiber posts to root dentine

Ferreira

Renovato

Santana

et al. 2016

Rev. Odonto Ciênc. (Online)

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Objective: This study evaluated the effect of internal bleaching agents on the bond strength of glass fiber posts to root dentine. Methods: Seventy bovine teeth were divided into 7 experimental groups (n=10) according to the bleaching agent used: SpH -sodium perborate + 20% hydrogen peroxide; SpW -sodium perborate + distilled water; Cp37 -37% carbamide peroxide; Cp16 -16% carbamide peroxide; Cp10 -10% carbamide peroxide; H -35% hydrogen peroxide; C -no bleaching agent (control). After bleaching, posts were cemented with a self-adhesive resin cement (RelyX U100) and the roots were crosssectioned to obtain two discs from each third. The posts underwent micropush-out testing, and bond strength values (MPa) were analyzed using ANOVA in a split-plot arrangement and the Tukey test (p<0.05). Failure mode was evaluated under confocal microscopy. Results: There were no significant differences between the control and bleaching agent groups. Bond strength was greater in the cervical third of the 16% carbamide peroxide (Cp16) group than in the sodium perborate + 20% hydrogen peroxide (SpH) group. The cervical third had a higher bond strength than the apical third in the 10% carbamide peroxide (Cp10), 16% carbamide peroxide (Cp16) and sodium perborate + distilled water (SpW) groups, and no significant differences in the other groups. Adhesive cement-dentine failure was prevalent in all groups. Conclusion: The use of internal bleaching agents did not decrease the bond strength of glass fiber posts to root dentin.

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Comparison of regional bond strength in root thirds among fiber‐reinforced posts luted with different cements

Abstract: Highest bond strength values were obtained in the cervical third and with resin cements.

Cited by 62 publications

References 43 publications

Effect of light-activation with different light-curing units and time intervals on resin cement bond strength to intraradicular dentin

Effect of light-activation with different light-curing units and time intervals on resin cement bond strength to intraradicular dentin

Influence of Relining Post on the Bond Strength of Resin Cements

Effect of internal bleaching agents on the bond strength of glass fiber posts to root dentine

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