Influence of dentin bonding agents and polymerization modes on the bond strength between translucent fiber posts and three dentin regions within a post space

Akgüngör, Gökhan; Akkayan, Begüm

doi:10.1016/j.prosdent.2006.02.027

Cited by 108 publications

(107 citation statements)

References 20 publications

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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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“…44 The resin cement was applied only on the post, which may have resulted in the observed cement voids. The use of a rotary spiral paste filler reduces that possibility, 34 but it is contraindicated by the manufacturer. Another potential limitation was the fact that clinical failure was used to determine when the specimens failed.…”

mentioning

confidence: 99%

Fracture resistance of compromised endodontically treated teeth restored with bonded post and cores: An in vitro study

Maroulakos

Nagy

Kontogiorgos

2015

The Journal of Prosthetic Dentistry

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“…1 It has been reported, however, that dualcure resins have poorer mechanical properties when the polymerization reaction is limited to a chemicalcure mode alone. 2,3 Although important for resin pastes, proper light irradiation of the adhesive is also required to achieve the optimal dentin bond strength.…”

Section: Introductionmentioning

confidence: 99%

Influence of Light Intensity on Surface Free Energy and Dentin Bond Strength of Core Build-up Resins

Shimizu

Tsujimoto

Furuichi³

et al. 2015

Operative Dentistry

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SUMMARY Objective We examined the influence of light intensity on surface free energy characteristics and dentin bond strength of dual-cure direct core build-up resin systems. Methods Two commercially available dual-cure direct core build-up resin systems, Clearfil DC Core Automix with Clearfil Bond SE One and UniFil Core EM with Self-Etching Bond, were studied. Bovine mandibular incisors were mounted in acrylic resin and the facial dentin surfaces were wet ground on 600-grit silicon carbide paper. Adhesives were applied to dentin surfaces and cured with light intensities of 0 (no irradiation), 200, 400, and 600 mW/cm2. The surface free energy of the adhesives (five samples per group) was determined by measuring the contact angles of three test liquids placed on the cured adhesives. To determine the strength of the dentin bond, the core build-up resin pastes were condensed into the mold on the adhesive-treated dentin surfaces according to the methods described for the surface free energy measurement. The resin pastes were cured with the same light intensities as those used for the adhesives. Ten specimens per group were stored in water maintained at 37°C for 24 hours, after which they were shear tested at a crosshead speed of 1.0 mm/minute in a universal testing machine. Two-way analysis of variance (ANOVA) and a Tukey-Kramer test were performed, with the significance level set at 0.05. Results The surface free energies of the adhesive-treated dentin surfaces decreased with an increase in the light intensity of the curing unit. Two-way ANOVA revealed that the type of core build-up system and the light intensity significantly influence the bond strength, although there was no significant interaction between the two factors. The highest bond strengths were achieved when the resin pastes were cured with the strongest light intensity for all the core build-up systems. When polymerized with a light intensity of 200 mW/cm2 or less, significantly lower bond strengths were observed. Conclusions The data suggest that the dentin bond strength of core build-up systems are still affected by the light intensity of the curing unit, which is based on the surface free energy of the adhesives. On the basis of the results and limitations of the test conditions used in this study, it appears that a light intensity of >400 mW/cm2 may be required for achieving the optimal dentin bond strength.

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Influence of dentin bonding agents and polymerization modes on the bond strength between translucent fiber posts and three dentin regions within a post space

Cited by 108 publications

References 20 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

Fracture resistance of compromised endodontically treated teeth restored with bonded post and cores: An in vitro study

Influence of Light Intensity on Surface Free Energy and Dentin Bond Strength of Core Build-up Resins

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