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KMID : 1034420140390040282
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Restorative Dentistry & Endodontics
2014 Volume.39 No. 4 p.282 ~ p.287
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Push-out bond strength of a self-adhesive resin cement used as endodontic sealer
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Gurgel-Filho Eduardo Diogo
Lima Felipe Coelho
Saboia Vicente de Paula Aragao
Coutinho-Filho Tauby de Souza
Neves Aline de Almeida
Da Silva Emmanuel Joao Nogueira Leal
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Abstract
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Objectives: The aim of the present study was to investigate the bond strength of RelyX Unicem (3M) to root canal dentin when used as an endodontic sealer.
Materials and Methods: Samples of 24 single-rooted teeth were prepared with Gates Glidden drills and K3 files. After that, the roots were randomly assigned to three experimental groups (n = 8) according to the filling material, (1) AH Plus (Dentsply De Trey GmbH)/Gutta-Percha cone; (2) Epiphany SE (Pentron)/Resilon cone; (3) RelyX Unicem/Gutta-Percha cone. All roots were filled using a single cone technique associated to vertical condensation. After the filling procedures, each tooth was prepared for a push-out bond strenght test by cutting 1 mm-thick root slices. Loading was performed on a universal testing machine at a speed of 0.5 mm/min. One-way analysis of variance and Tukey test for multiple comparisons were used to compare the results among the experimental groups.
Results: Epiphany SE/Resilon showed significantly lower push-out bond strength than both AH Plus/Gutta-Percha and RelyX Unicem/Gutta-Percha (p < 0.05). There was no significant difference in bond strength between AH Plus/Gutta-Percha and RelyX Unicem/Gutta-Percha (p > 0.05).
Conclusions: Under the present in vitro conditions, bond strength to root dentin promoted by RelyX Unicem was similar to AH Plus. Epiphany SE/Resilon resulted in lower bond strength values when compared to both materials.
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KEYWORD
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Bond strength, Push out test, Resin-based cement, Root canal filling materials
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