Swelling of self-adhesive resin cement increases long-term push-out bond strength of fiber post to dentin


  • Fabrício Mezzomo Collares Universidade Federal do Rio Grande do Sul
  • Vicente Castelo Branco Leitune Universidade Federal do Rio Grande do Sul.
  • Carolina Rocha Augusto Universidade Federal do Rio Grande do Su
  • Patrícia Franken Universidade Federal do Rio Grande do Sul
  • Susana Maria Werner Samuel Universidade Federal do Rio Grande do Sul




resin cements. dentin-bonding agents. solubility. water storage


Aim: To evaluate the long-term post push-out bond strength to dentin, water sorption, solubility and swelling of conventional and self-adhesive dual-cure resin cements. Methods: Forty-eight bovine roots were prepared for fiber post cementation with RelyX ARC and RelyX U100. According to resin cement and storage time (24 h and 6 months), 4 groups were assessed using the push-out test. Water sorption and solubility were performed according to ISO 4049:2009. The swelling coefficient was obtained using cement disks of each material immersed in distilled water until the swelling equilibrium was reached. The mass of dry and swelled polymer and solvent density were used to calculate the coefficient. Statistical data analysis was performed using Student’s t-test for water sorption, solubility and swelling coefficient and the Kruskal-Wallis and Dunn multiple comparison tests for push-out analysis with a significance level of 0.05. Results: The immediate bond strength was not significantly different between RelyX ARC (3.09 MPa) and RelyX U100 (3.78 MPa) (p>0.05). RelyX U100 showed higher (p<0.05) bond strength after six months of storage (9.60 MPa) than RelyX ARC (6.65 MPa). The water sorption and solubility values were not significantly different (p>0.05) between groups. The swelling coefficient of the RelyX U100 group was significantly higher than that of the RelyX ARC group (p<0.05). Conclusions: RelyX U100 resin cement showed a higher swelling coefficient than RelyX ARC, and the longitudinal push-out bond strength increased after six months. Clinical significance: The clinical longevity of restorative treatment in root-filled teeth is dependent on the long-term properties and behavior of the cement used for post luting. Results of this study suggest that the selfadhesive resin cement may be a reliable alternative.


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Author Biographies

Vicente Castelo Branco Leitune, Universidade Federal do Rio Grande do Sul.

Possui Graduação em Odontologia pela Universidade Federal do Rio Grande do Sul (2005), Mestrado em Odontologia Área de Concentração Clínica Odontológica-Materiais Dentários pela Universidade Federal do Rio Grande do Sul (2010) e Doutorado em Odontologia Área de Concentração Clínica Odontológica-Materiais Dentários pela Universidade Federal do Rio Grande do Sul (2012).

Carolina Rocha Augusto, Universidade Federal do Rio Grande do Su

Possui graduação em Odontologia pela Universidade do Estado do Amazonas (2008) e mestrado em Clínica Odontológica - Materiais Dentários pela Universidade Federal do Rio Grande do Sul (2013). Tem experiência na área de Odontologia, com ênfase em Clínica Odontológica, atuando principalmente nos seguintes áreas: materiais dentários, prótese dentária, dentística e clínica odontológica.

Patrícia Franken, Universidade Federal do Rio Grande do Sul

Dra. Patrícia Franken é Cirurgiã-Dentista em Porto Alegre, RS. Possui graduação em odontologia pela PUCRS - Pontifícia Universidade Católica do Rio Grande do Sul. Atua como especialista em Prótese Dentária. Faz parte do iDent desde Outubro de 2012.

Susana Maria Werner Samuel, Universidade Federal do Rio Grande do Sul

Possui mestrado em Materiais Dentários pela Universidade Estadual de Campinas (1991) e doutorado em Materiais Dentários pela Universidade Estadual de Campinas (1993). Atualmente é Professora Titular de Materiais Dentários da Universidade Federal do Rio Grande do Sul.


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How to Cite

Collares FM, Leitune VCB, Augusto CR, Franken P, Samuel SMW. Swelling of self-adhesive resin cement increases long-term push-out bond strength of fiber post to dentin. Braz. J. Oral Sci. [Internet]. 2015 Jan. 1 [cited 2022 Sep. 28];14(3):246-50. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642880




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