Danielle Araújo Vilas-Boas1, Renata Grazziotin-Soares2, Diego Machado Ardenghi3, José Bauer4, Patrícia Oliveira de Souza1, George Táccio de Miranda Candeiro5, Etevaldo Matos Maia-Filho1, Ceci Nunes Carvalho6. 1. Dental School, CEUMA University (UNICEUMA), Rua Josué Montello n° 1, Renascença II, São Luís, Maranhão, 65075120, Brazil. 2. Discipline of Endodontics, College of Dentistry, University of Saskatchewan, 105 Wiggins Road, Saskatoon, Saskatchewan, S7N5E4, Canada. 3. University of Saskatchewan, College of Dentistry, 105 Wiggins Road, Saskatoon, Saskatchewan, S7N 5E4, Canada. 4. Discipline of Dental Materials, School of Dentistry, Federal University of Maranhão (UFMA), São Luís, Maranhão, Brazil. 5. Dental Sciences Post-graduation Program, School of Dentistry, Universitary Center Christus, Fortaleza, Brazil. 6. Dental School, CEUMA University (UNICEUMA), Rua Josué Montello n° 1, Renascença II, São Luís, Maranhão, 65075120, Brazil. cecicar@usp.br.
Abstract
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.
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.
Entities:
Keywords:
Fiber post; Push-out bond strength; Resin cement; Root; Sealer
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