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KMID : 1034420230480030028
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Restorative Dentistry & Endodontics
2023 Volume.48 No. 3 p.28 ~ p.28
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Effect of irrigation protocols on smear layer removal, bond strength and nanoleakage of fiber posts using a self-adhesive resin cement
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Rodrigo Stadler Alessi
Renata Terumi Jitumori
Bruna Fortes Bittencourt
Giovana Mongruel Gomes
Joao Carlos Gomes
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Abstract
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Objectives : This study aimed to investigate the effect of the application method of 2% chlorhexidine (CHX) and its influence on the adhesion of fiberglass posts cemented with a self-adhesive resin cement.
Materials and Methods : Sixty human mandibular premolars were endodontically treated and divided into 5 groups (n = 12), according to the canal irrigant and its application method: 2 groups with conventional syringe irrigation (CSI)?2.5% sodium hypochlorite (NaOCl) (control) and 2% CHX? and 3 groups with 2% CHX irrigation/activation?by passive ultrasonic irrigation (PUI), Easy Clean file, and XP-Endo Finisher file. Two roots per group were evaluated for smear layer (SL) removal by scanning electron microscopy. For other roots, fiber posts were luted using a self-adhesive resin cement. The roots were sectioned into 6 slices for push-out bond strength (BS) (7/group) and nanoleakage (NL) (3/group). Data from SL removal were submitted to Kruskal-Wallis and Student-Newman-Keuls tests (α = 0.05). Data from BS and NL were evaluated by 2-way analysis of variance and Tukey’s test (α = 0.05).
Results : For SL removal and BS, the CHX irrigation/activation promoted better values than CSI with CHX (p < 0.05), but it was not significantly different from CSI with NaOCl (p > 0.05). For NL, the lowest values were obtained by the chlorhexidine irrigation/activation groups (p < 0.05).
Conclusions : Active 2% CHX irrigation can be used to improve the post space cleaning and adhesion before fiber post cementation with self-adhesive resin cements.
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KEYWORD
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Bond strength, Chlorhexidine, Endodontic fiber posts, Nanoleakage, Root canal irrigants, Self-adhesive luting
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