Effect of different endodontic sealers and time of cementation on push-out bond strength of fiber posts.

Autor: Vilas-Boas DA; Dental School, CEUMA University (UNICEUMA), Rua Josué Montello n° 1, Renascença II, São Luís, Maranhão, 65075120, Brazil., Grazziotin-Soares R; Discipline of Endodontics, College of Dentistry, University of Saskatchewan, 105 Wiggins Road, Saskatoon, Saskatchewan, S7N5E4, Canada., Ardenghi DM; University of Saskatchewan, College of Dentistry, 105 Wiggins Road, Saskatoon, Saskatchewan, S7N 5E4, Canada., Bauer J; Discipline of Dental Materials, School of Dentistry, Federal University of Maranhão (UFMA), São Luís, Maranhão, Brazil., de Souza PO; Dental School, CEUMA University (UNICEUMA), Rua Josué Montello n° 1, Renascença II, São Luís, Maranhão, 65075120, Brazil., de Miranda Candeiro GT; Dental Sciences Post-graduation Program, School of Dentistry, Universitary Center Christus, Fortaleza, Brazil., Maia-Filho EM; Dental School, CEUMA University (UNICEUMA), Rua Josué Montello n° 1, Renascença II, São Luís, Maranhão, 65075120, Brazil., Carvalho CN; Dental School, CEUMA University (UNICEUMA), Rua Josué Montello n° 1, Renascença II, São Luís, Maranhão, 65075120, Brazil. cecicar@usp.br.
Jazyk: angličtina
Zdroj: Clinical oral investigations [Clin Oral Investig] 2018 Apr; Vol. 22 (3), pp. 1403-1409. Date of Electronic Publication: 2017 Oct 11.
DOI: 10.1007/s00784-017-2230-z
Abstrakt: Objectives: This study aims to evaluate the effect of different endodontic sealers (epoxy resin, eugenol, and bioceramic/calcium silicate-based) and the time of cementation (immediately or 7 days after canal obturation) on the bond strength of a fiberglass post cemented with RelyX™ ARC.
Material and Methods: Eighty-four premolars were instrumented and divided into groups (n = 12) according to the sealer and the time of post cementation: Endofill (EN), Endosequence BC Sealer (BC), and AH Plus (AH) had immediately fiber post cementation; EN7, BC7, and AH7 had post cementation after 7 days; and control group (C) had fiber post cementation without endodontic sealer. Each post space of the root was cut into slices and submitted to push-out test. Failure mode was assessed. Two-way ANOVA, Tukey's, and Dunnett's tests were used for statistical analysis (α = 5%).
Results: The type of endodontic sealer (p < 0.001), the time of post cementation (p = 0.038), and the interaction sealer time (p = 0.002) had negative influence on bond strength of fiberglass posts cemented with RelyX™ ARC. AH promoted the highest bond strength mean values (21.20 MPa immediately and 15.54 MPa at 7 days). EN (9.75 MPa immediately and 13.15 MPa at 7 days) and BC (10.43 MPa immediately and 5.73 MPa at 7 days) had lower bond strength than AH, regardless the time of cementation.
Conclusions: AH was the best sealer to obturate the root canal when fiberglass cementation with resin-based cement is planned.
Clinical Relevance: The correct choice of an endodontic sealer and the adequate time of post cementation may avoid post dislocation caused by low bond strength to dentin.
Databáze: MEDLINE
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