Bond strength of three ceramic systems and a palladium-silver alloy

Author(s)

Juliano Milczewsky Scolaro

• Document type: Master's Dissertation
• Press: Bauru.
• Institution: Universidade de São Paulo (USP). Faculdade de Odontologia de Bauru (FOB/SDB)
• Defense date: 2000-04-12

Examining board members

Accacio Lins do Valle; Wellington Cardoso Bonachela; Paulo Afonso Silveira Francisconi

• Advisor: Accacio Lins do Valle

Abstract

The purpose of this study was to evaluate the bond strength of a palladium-silver alloy (Pors-on 4) to three ceramic systems (Ceramco, Noritake and Vita VMK-68) using shear forces at the metal-ceramic interface. The method used for the tests was that developed by CHONG, BEECH e CHEM19, modified by BATISTA7. A stainless steel cylindric matrix was used for preparation of the metal patterns, application of ceramic and to perform the shear tests. Thirty specimens were prepared consisting of a palladium-silver alloy cylinder with two layers of opaque porcelain covered by two layers of body porcelain. The shear tests were perfomed in a universal testing machine using a load cell of 100kgf at a cross head speed of 0,5mm/min. The mean shear strength values for the three ceramic systems were: 28.212MPa (Ceramco), 28.963MPa (Noritake) and 24.110MPa Vita VMK-68). No statistically significant diferences were found among the groups what led us to conclude that the three ceramic systems are suitable for use in combination with the selected alloy. (AU)