Abstract
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.
Highlights
The adhesion between tooth structure and adhesive cement is the result of physical and chemical interactions in dentin-cement interface [1]
This study aimed to evaluate the bond strength of resin cements in root canals prepared with two irrigating solutions: ginger extract and sodium hypochlorite
This study shows innovative since there are not other reports in the literature using ginger and intraradicular post cementation
Summary
The adhesion between tooth structure and adhesive cement is the result of physical and chemical interactions in dentin-cement interface [1]. Among the marketed endodontic irrigating solutions, sodium hypochlorite, at different concentrations, is the most commonly used, fact supported by its dissolution capacity for necrotic tissue, antimicrobial [2,3] and detergent actions, and low surface tension. Zingiber officinale is native of Asia and contains vitamins, minerals and polyphenols, including the gingerol, shogaols, paradols and gingerone. These constituents compromise the anti-inflammatory and analgesic properties of ginger [3,7,8], previous studies have shown the effectiveness of ginger as intracanal medication on Enterococcus faecalis, Candida albicans and Escherichia coli [8,9]. Ginger properties and applications still lack scientific explanations, once its physicochemical properties and its possible interference to adhesion of restorative materials are not fully known
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