Influência do tipo de substrato dentinário na resistência de união a microtração - estudo “in vitro”

Authors

  • Paulo Afonso Burmann Universidade Federal de Santa Maria - UFSM
  • Luciana Borges Retamoso
  • Mariana Boessio Vizzotto
  • Sabrina Almeida do Nascimento
  • Fernanda Tranchesi Sadek
  • Paulo Eduardo Capel Cardoso

DOI:

https://doi.org/10.14295/bds.2007.v10i1.418

Abstract

Este estudo avaliou a resistência de união entre o conjunto resina composta/adesivo e diferentes tipos de substrato dentinário. Quinze molares humanos extraídos foram divididos em três grupos de acordo com o tipo de dentina: 5 dentes com dentina afetada por cárie (C), 5 restaurados com amálgama (R) e 5 dentes hígidos (H). Todos os dentes tiveram sua superfície oclusal desgastada até expor uma superfície dentinária plana. As diferentes superfícies foram condicionadas com ácido fosfórico a 37% (3M ESPE), seguindo-se a aplicação e fotopolimerização do adesivo Single Bond (3M ESPE) para a imediata inserção de incrementos de 1 mm de resina composta (Z250 – 3M ESPE) até atingir 4 mm de altura. Após 24 horas de armazenagem em água destilada (37ºC), os corpos-de-prova em forma de palito com secção transversal de 1 mm2 de área foram submetidos ao ensaio de microtração (Instron). A análise estatística (ANOVA/Tukey) revelou que o fator substrato interferiu na resistência adesiva (p<0,05), com a dentina hígida (42,0±7,1 MPa a) proporcionando maiores valores que a dentina restaurada (37,1±4,7 MPa b) e que a cariada (37,7±4,8 MPa b).

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Published

2010-08-15

How to Cite

1.
Burmann PA, Retamoso LB, Vizzotto MB, Nascimento SA do, Sadek FT, Cardoso PEC. Influência do tipo de substrato dentinário na resistência de união a microtração - estudo “in vitro”. BDS [Internet]. 2010 Aug. 15 [cited 2025 Aug. 24];10(1). Available from: https://bds.ict.unesp.br/index.php/cob/article/view/418

Issue

Vol. 10 No. 1 (2007)

Section

Clinical or Laboratorial Research

License

Brazilian Dental Science uses the Creative Commons (CC-BY 4.0) license, thus preserving the integrity of articles in an open access environment. The journal allows the author to retain publishing rights without restrictions.

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