Influence of endodontic sealers with different chemical compositions on bond strength of the resin cement/glass fiber po
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ORIGINAL ARTICLE
Influence of endodontic sealers with different chemical compositions on bond strength of the resin cement/glass fiber post junction to root dentin Isadora Mello Vilarinho Soares 1 & Bruno Monguilhott Crozeta 1 & Rodrigo Dantas Pereira 1 & Ricardo Gariba Silva 1 & Antonio Miranda da Cruz-Filho 1 Received: 19 March 2019 / Accepted: 15 January 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Objective This study evaluated the influence of endodontic sealers with different chemical compositions on bond strength of resin cement/glass fiber post junction to root dentin. Materials and methods Seventy-two maxillary canines roots were instrumented with Reciproc (#R50) and distributed in 6 groups (n = 12) according to endodontic sealers: G1—control (no sealer); G2—Endofill; G3—Sealapex; G4—AH Plus; G5— Sealer Plus; G6—EndoSequence BC. The glass fiber post was cemented with Panavia F in 10 of the specimens. Two specimens from each group did not receive post and were analyzed by SEM to verify presence of filling material. Three slices were obtained from each third. The first slice was subjected to push-out test and type of failure. The second slice was imaged using laser confocal microscopy for evaluation of dentin/resin cement adhesive interface. Bond strength (BS) data were analyzed using twoway ANOVA and Tukey’s post hoc tests; for LCM data, we used Kruskal-Wallis and Dunn’s tests. Results Endofill yielded the lowest BS values (p < 0.05). The control and AH Plus groups differed from all others (p < 0.05). In all groups, adhesive to dentin failure predominated. Most specimens of control and AH Plus groups had acceptable interfaces, while those of EndoSequence BC, Sealapex, and Sealer Plus groups ranged between acceptable and poor interfaces. Overall, few filling material remnants were observed on the dentin. Conclusion EndoSequence BC, Sealapex, Sealer Plus, and Endofill negatively interfere with BS of glass fiber post/resin cement junction to root dentin. Clinical relevance In cases whose restoration planning includes a post cemented with resin cement, it is recommended that endodontic sealer be based on epoxy resin. Keywords Push bond strength . Root canal filling . Glass fiber post . Resin cement
Introduction Most endodontically treated teeth are compromised by coronal destruction and require root retention for coronal reconstruction [1]. When an intra-canal post needs to be placed, glass fiber posts are suitable alternatives because they have similar properties to root dentin, and they are simple and quick to insert, and are esthetically superior for anterior teeth [2, 3]. Resin cement is recommended for cementing glass fiber posts * Antonio Miranda da Cruz-Filho [email protected] 1
Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
as it provides better retention, lower microleakage, and higher shear bond strength values compared with zinc phosphate cement [4, 5]. However, the endodontic sealer use
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