Glass fiber posts

influence of cementation techniques on push-out bond strength

Keywords: Cementation, Composite resins, Dental cements

Abstract

Aim: Glass fiber posts are indicated in the rehabilitation of extensively damaged teeth; their cementation represents a critical step in restorative dentistry. The aim of this study was to quantify and compare the push-out bond strength of glass fiber posts cemented by conventional technique, two-step technique with luting agent and two-step technique associating bulk-fill composite and luting agent. Methods: Eighty maxillary bovine incisors were endodontically treated and divided into eight groups (n = 10) according to the luting agent (Rely X ARC and Duo-link) and cementation technique (conventional technique; two-step technique with luting agent; and two-step technique associating bulk-fill composite – Filtek Bulk-fill flow or Surefil SDR flow – and luting agent). Samples were submitted to pushout bond strength test, and the fracture pattern was evaluated through scanning electron microscope. Data were submitted to two-way ANOVA and Tukey’s test (α = 0.05). Results: When Rely X ARC was used, the conventional cementation technique obtained higher bond strength values than the twostep technique associated with Filtek Bulk-fill flow. When Duolink was used, the two-step technique associated with Filtek Bulk-fill flow presented higher bond strength values than the conventional technique. The most prevalent fracture patterns were adhesive between luting agent and dentin, and adhesive between bulk-fill composite and dentin. Conclusion: Two-step cementation technique associated with bulk-fill composite may be promising depending on the luting agent used.

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Author Biographies

Renata Pereira, University of Campinas

Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil.

Rodrigo Barros Esteves Lins, University of Campinas

Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil.

Victória Castelan Rodrigues, University of Campinas

Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil

Débora Alves Nunes Leite Lima, University of Campinas

Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil

Luís Roberto Marcondes Martins, University of Campinas

Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil

Flávio Henrique Baggio Aguiar, University of Campinas

Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil

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Published
2020-05-18
How to Cite
Pereira, R., Lins, R. B. E., Rodrigues, V. C., Lima, D. A. N. L., Martins, L. R. M., & Aguiar, F. H. B. (2020). Glass fiber posts. Brazilian Journal of Oral Sciences, 19, e207508. https://doi.org/10.20396/bjos.v19i0.8657508

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