Bond Strength between Fiber Posts and Root Dentin Treated with Natural Cross-linkers

Cecchin, Doglas; Pin, Letícia Cazarotto; Farina, Ana Paula; Souza, Matheus Albino; Vidal, Cristina; Bello, Yuri Dal; Ferraz, Caio Cézar Randi; Bedran-Russo, Ana K.

doi:10.1016/j.joen.2015.05.022

Cited by 23 publications

(28 citation statements)

References 36 publications

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“…There are two ongoing efforts to improve the long-term stability of the interface materials, and hence, the longevity of composite restorations: advancements in resin composite chemistry for increased stability in the oral environment, and strengthening and stabilization of dentin matrix at the dentin–resin interface. The latter can be achieved by an increase in the number of inter- and intramicrofibrillar cross-links within type I collagen fibrils through the use of exogenous natural and synthetic cross-linkers [6]. The use of plant-derived extracts as collagen cross-linkers is more attractive and promising due to their biocompatibility and wide source availability of these compounds compared to their synthetic counterparts [7].…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of grape seed extract in polylactide microcapsules for sustained bioactivity and time-dependent release in dental material applications

et al. 2017

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Objective To sustain the bioactivity of proanthocyanidins-rich plant-derived extracts via encapsulation within biodegradable polymer microcapsules. Methods Polylactide microcapsules containing grape seed extract (GSE) were manufactured using a combination of double emulsion and solvent evaporation techniques. Microcapsule morphology, size distribution, and cross-section were examined via scanning electron microscopy. UV-vis measurements were carried out to evaluate the core loading and encapsulation efficiency of microcapsules. The bioactivity of extracts was evaluated after extraction from capsules via solvent partitioning one week or one year post-encapsulation process. Fifteen human molars were cut into 7mm × 1.7 mm μ0.5 mm thick mid-coronal dentin beams, demineralized, and treated with either encapsulated GSE, pristine GSE, or left untreated. The elastic modulus of dentin specimens was measured based on three-point bending experiments as an indirect assessment of the bioactivity of grape seed extracts. The effects of the encapsulation process and storage time on the bioactivity of extracts were analyzed. Results Polynuclear microcapsules with average diameter of 1.38 μm and core loading of up to 38wt% were successfully manufactured. There were no statistically significant differences in the mean fold increase of elastic modulus values among the samples treated with encapsulated or pristine GSE (p = 0.333), or the storage time (one week versus one year storage at room temperature, p = 0.967). Significance Polynuclear microcapsules containing proanthocyanidins-rich plant-derived extracts were prepared. The bioactivity of extracts was preserved after microencapsulation.

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Section: Introductionmentioning

confidence: 99%

Encapsulation of grape seed extract in polylactide microcapsules for sustained bioactivity and time-dependent release in dental material applications

et al. 2017

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“…The interaction of PACs with MMPs could induce irreversible changes in the catalytic domain, or by allosteric inhibition of other modular domains involved in collagen degradation [34]. Such modifications can result in a decreased ability of the enzymes to degrade the substrate [2], confirmed by recent findings [22, 35]. Like CHX, DOXY directly inactivates collagenases by binding to metal ions such as Zn 2+ and Ca 2+ that are required by the enzyme to maintain its proper conformation and proteolytic activity [36].…”

Section: Discussionmentioning

confidence: 77%

“…The effective interaction of PACs and the dentin matrix remarkably increases the dentin matrix’s resistance to enzymatic degradation [3, 7, 22, 33, 44] without interfering with the formation of the hybrid layer [6, 21, 35]. The lack of enhanced bond strength by e-GSE may be also due to the use of a high-C factor cavity design, application time and restorative protocol [21].…”

Section: Discussionmentioning

confidence: 99%

Experimental primers containing synthetic and natural compounds reduce enzymatic activity at the dentin–adhesive interface under cyclic loading

et al. 2016

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Objective To evaluate the effect of experimental primers (chlorhexidine, enriched mixture of proanthocyanidins and doxycycline) on the adhesive properties and gelatinolytic activity at dentin-resin interfaces of occlusal Class I restorations. Methods The inactivation of enzymes by the experimental primers was assessed by fluorescence assay and gelatin zymography. To assess the adhesive properties, occlusal Class I cavities were prepared in sound human molars, etched with phosphoric acid and restored with one of the primers and an etch-and-rinse adhesive system (Adper Single Bond Plus - 3M ESPE). After the restorative procedures, the specimens were divided into two subgroups (n = 6) consisting of storage in incubation buffer or axial cyclic loading at 50 N and 1,000,000 cycles. Then, the sectioned and sliced specimens were assigned to in situ zymography assay and microtensile bond strength (TBS) test. Results Fluorescence assay and gelatin zymography revealed that the experimental primers inactivated rMMPs. In situ zymography (2-way ANOVA, Tukey, p < 0.05) showed that cyclic loading increased the gelatinolytic activity at the resin-dentin interface and the experimental primers decreased the gelatinolytic activity at the adhesive interface. The experimental primers had no significant effects on dentin-adhesive bond strengths with or without cyclic loading (2-way ANOVA, p > 0.05). Significance The use of experimental primers impaired the enzymatic activity at the dentin-adhesive interface after cyclic loading and the activity of rMMPs. Cyclic loading did not have a significant effect on the bond strength.

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“…Replacement of phosphoric acid etching for acid monomers presents in self-etching luting agent promotes lower hybridization and weaker adhesion (16). According to previous study (19), the lower of stability in the bond strength between dentin-resin monomers may be due to hydrolytic deterioration of the components of the dentin, attributed to endogenous proteolytic mechanism due to the activity of metalloproteinases (MMPs) (20). The MMPs are endogenous proteases that are zinc and calcium dependent present in the mineralized dentin.…”

Section: Discussionmentioning

confidence: 98%

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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Bond Strength between Fiber Posts and Root Dentin Treated with Natural Cross-linkers

Cited by 23 publications

References 36 publications

Encapsulation of grape seed extract in polylactide microcapsules for sustained bioactivity and time-dependent release in dental material applications

Encapsulation of grape seed extract in polylactide microcapsules for sustained bioactivity and time-dependent release in dental material applications

Experimental primers containing synthetic and natural compounds reduce enzymatic activity at the dentin–adhesive interface under cyclic loading

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

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