DIFERENTES ÁREAS ADESIVAS AFETAM A RESISTÊNCIA DE UNIÃO AO MICROCISALHAMENTO?

Kevelin Poliana Palma Rigo Thiesen; Mariana Macedo Ribas; Guilherme Schmitt de Andrade; Flávia Pardo Salata Nahsan; Vera Lucia Schmitt; Fabiana Scarparo Naufel

doi:10.17765/1518-1243.2017v19n2p179-185

Authors

Kevelin Poliana Palma Rigo Thiesen Universidade Estadual do Oeste do Paraná - UNIOESTE
Mariana Macedo Ribas Universidade Estadual do Oeste do Paraná - UNIOESTE
Guilherme Schmitt de Andrade Universidade Estadual Paulista - UNESP
Flávia Pardo Salata Nahsan Universidade Federal de Sergipe - UFS
Vera Lucia Schmitt Universidade Estadual do Oeste do Paraná - UNIOESTE
Fabiana Scarparo Naufel Universidade Estadual do Oeste do Paraná - UNIOESTE

DOI:

https://doi.org/10.17765/1518-1243.2017v19n2p179-185

Keywords:

Resistência ao cisalhamento, Adesivos, Cerâmicas

Abstract

The smaller the surface area, the greater is the resistance. Specimens with small surface area have a better stress distribution and a reduction in the number of internal faults. Bonding resistance to micro-shearing of specimens with two different diameters, 0.55 mm and 0.76 mm, were analyzed. Forty Suprinity ceramic slices, 1.3 mm thick, polished by file #600, were randomly divided into two groups (n=20). Four adhesive areas in each slice were delimited by adhesive tape and fixed to circular matrixes. Specimens were conditioned with hydrofluoric acid 5% (FGM) for 20 s, washed, dried, silanized (RelyX Ceramic Primer - 3M ESPE) and dried by air jet. Matrixes were filled with resinous cement RelyX U200 3M ESPE and photopolymerized for 100 s. After 24 h in de-ionized water at 37o C, the specimens underwent micro-shearing test at 0.5 mm/min. Normal and homogeneous data were submitted to ANOVA for totally randomized assay, with no significant difference (p=0.62) between the two areas under analysis – 23.74±4.49 and 24.85±4.41, respectively for areas 0.55 and 0.76 mm. Results show that no bonding resistance to micro-shearing exists when different adhesive areas are employed.

Author Biographies

Kevelin Poliana Palma Rigo Thiesen, Universidade Estadual do Oeste do Paraná - UNIOESTE

Departamento de Odontologia Restauradora, Divisão de Materiais Dentários

Mariana Macedo Ribas, Universidade Estadual do Oeste do Paraná - UNIOESTE

Departamento de Odontologia Restauradora, Divisão de Materiais Dentários

Guilherme Schmitt de Andrade, Universidade Estadual Paulista - UNESP

Instituto de ciência e tecnologia, Departamento de prótese e materiais dentários - São José dos Campos

Flávia Pardo Salata Nahsan, Universidade Federal de Sergipe - UFS

Professora Adjunta, Programa em Odontologia

Vera Lucia Schmitt, Universidade Estadual do Oeste do Paraná - UNIOESTE

Departamento de Odontologia Restauradora, Divisão de Materiais Dentários

Fabiana Scarparo Naufel, Universidade Estadual do Oeste do Paraná - UNIOESTE

Departamento de Odontologia Restauradora, Divisão de Materiais Dentários

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