Effects of using different root canal sealers and protocols for cleaning intraradicular dentin on the bond strength of a composite resin used to reinforce weakened roots.

Luiz Pascoal Vansan; Ricardo Machado; Celso Bernardes de Souza; Ricardo Gariba; Antônio Miranda da Cruz; Cinara Muniz; Jardel Francisco Mazzi-Chaves; Lucas da Fonseca Roberti Garcia

doi:10.17126/joralres.2022.063

Luiz Pascoal Vansan Department of Restorative Dentistry (Endodontics), Ribeirão Preto Dental School – FORP/USP, Ribeirão Preto, São Paulo, Brazil. http://orcid.org/0000-0003-4560-1750
Ricardo Machado Clinical Practice Limited to Endodontics, Navegantes, Santa Catarina, Brazil. http://orcid.org/0000-0003-4560-1750
Celso Bernardes de Souza Department of Endodontics, School of Dentistry, University of Ribeirão Preto – UNAERP, Ribeirão Preto, São Paulo, Brazil. http://orcid.org/0000-0002-4312-7576
Ricardo Gariba Department of Restorative Dentistry (Endodontics), Ribeirão Preto Dental School – FORP/USP, Ribeirão Preto, São Paulo, Brazil. http://orcid.org/0000-0003-2568-7999
Antônio Miranda da Cruz Department of Restorative Dentistry (Endodontics), Ribeirão Preto Dental School – FORP/USP, Ribeirão Preto, São Paulo, Brazil. http://orcid.org/0000-0002-5894-9046
Cinara Muniz Clinical Practice Limited to Esthetic Dentistry, Blumenau, Santa Catarina, Brazil. http://orcid.org/0000-0002-4901-525X
Jardel Francisco Mazzi-Chaves Department of Restorative Dentistry (Endodontics), Ribeirão Preto Dental School – FORP/USP, Ribeirão Preto, São Paulo, Brazil. http://orcid.org/0000-0002-9889-1790
Lucas da Fonseca Roberti Garcia Department of Dentistry - Endodontics, Health Sciences Center, Federal University of Santa Catarina UFSC, Florianópolis, Santa Catarina, Brazil. http://orcid.org/0000-0002-8724-0124

DOI: https://doi.org/10.17126/joralres.2022.063

Abstract

Background: This study evaluated the effects of using different root canal sealers and protocols for cleaning intraradicular dentin on the bond strength of a composite resin used to reinforce weakened roots.
Material and Methods: Sixty-four roots of extracted human maxillary canines were weakened, prepared and filled with two different endodontic sealers (Endofill and AH Plus). In half of the sample, set aside for each respective sealer, excess filling material was cleaned. In the other half, the weakened areas were not cleaned, and the excess of sealer was spread on the intraradicular dentin. Intentionally worn areas inside each root were restored with a microhybrid light-cure composite resin (Z100) to reinforce them, with and without acid etching. Prefabricated metal posts were fixed with a dual resin cement (RelyX ARC), and the specimens were submitted to a pull-out test. Statistical analysis was performed by means of Shapiro-Wilk, analysis of variance (one-way ANOVA) and Tukey-Kramer tests (p<0.05).
Results: The groups filled with Endofill (GI, GII, GIII, GIV) had the lowest bond strength values, which were similar among each other (p>0.05).The greatest bond strength values were observed in roots filled with AH Plus (GV, GVI, GVII, GVIII), mainly without cleaning of the weakened areas, and followed by acid etching (GVII), and also with cleaning of the weakened areas, however, with no acid etching (GVI) (p<0.05).
Conclusion: The greatest bond strength values were observed in roots filled with AH Plus; (1) without cleaning of the weakened areas and with acid etching, and; (2) with cleaning of the weakened areas, but without acid etching.

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Effects of using different root canal sealers and protocols for cleaning intraradicular dentin on the bond strength of a composite resin used to reinforce weakened roots.

Abstract

References

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