Avaliação da resistência às forças de cisalhamento de porcelanas aplicadas sobre liga de níquel-cromo e cobalto-cromo
José Aloísio FERNANDES
Resumo
Foi comparada a resistência de união metal-porcelana frente à força de cisalhamento entre uma liga de níquel-cromo sem berílio, Verabond II® e duas ligas de cobalto-cromo, New Ceram® e Wirobond C®, associadas a duas porcelanas, Omega 900® e Noritake EX-3®. Os resultados da análise e dos testes estatísticos mostraram que os grupos tomados em conjunto são estatisticamente diferentes entre si, no entanto, existem grupos estatisticamente iguais, formando dois conjuntos. Conjunto A: formado pelos grupos Verabond II® x Noritake, Verabond II® x Vita, Wirobond-C® x Noritake e conjunto B: New-Ceram® x Noritake, Wirobond-C® x Vita, New-Ceram® x Vita, sendo o conjunto B estatisticamente superior ao conjunto A. Assim, pela metodologia e resultados obtidos as ligas de cobalto-cromo tiveram resultados superiores às de níquel-cromo.
Termos de Indexação:
ABSTRACT
The porcelain-metal bonding strength between two cobalt-chrome alloys (New-Ceram® and Wirobond-C®) and one nickel-chrome alloy without beryllium (Verabond II®) associated with two types of porcelain, Omega 900® and Noritake EX-3® was compared in this work. Based on the results of the statistical analysis and tests it can be stated that the groups established are statistically different within them, however there are two groups which are statistically equal, thus forming two groups.. Group A: Verabond II® x Noritake®, Verabond II® x Vita®, Wirobond-C® x Noritake®; and Group B: New-Ceram® x Noritake®, Wirobond-C® x Vita®, New-Ceram® x Vita®, Group B showing results statistically superior than Group A. Thus, the cobalt-chrome alloys had superior results in comparison to the nickel-chrome alloys according to the methodology adopted and the results obtained.
Indexing terms:shear strength; chromium alloys; chromium alloys
Texto completo: PDF
Resumo
Foi comparada a resistência de união metal-porcelana frente à força de cisalhamento entre uma liga de níquel-cromo sem berílio, Verabond II® e duas ligas de cobalto-cromo, New Ceram® e Wirobond C®, associadas a duas porcelanas, Omega 900® e Noritake EX-3®. Os resultados da análise e dos testes estatísticos mostraram que os grupos tomados em conjunto são estatisticamente diferentes entre si, no entanto, existem grupos estatisticamente iguais, formando dois conjuntos. Conjunto A: formado pelos grupos Verabond II® x Noritake, Verabond II® x Vita, Wirobond-C® x Noritake e conjunto B: New-Ceram® x Noritake, Wirobond-C® x Vita, New-Ceram® x Vita, sendo o conjunto B estatisticamente superior ao conjunto A. Assim, pela metodologia e resultados obtidos as ligas de cobalto-cromo tiveram resultados superiores às de níquel-cromo.
Termos de Indexação:
ABSTRACT
The porcelain-metal bonding strength between two cobalt-chrome alloys (New-Ceram® and Wirobond-C®) and one nickel-chrome alloy without beryllium (Verabond II®) associated with two types of porcelain, Omega 900® and Noritake EX-3® was compared in this work. Based on the results of the statistical analysis and tests it can be stated that the groups established are statistically different within them, however there are two groups which are statistically equal, thus forming two groups.. Group A: Verabond II® x Noritake®, Verabond II® x Vita®, Wirobond-C® x Noritake®; and Group B: New-Ceram® x Noritake®, Wirobond-C® x Vita®, New-Ceram® x Vita®, Group B showing results statistically superior than Group A. Thus, the cobalt-chrome alloys had superior results in comparison to the nickel-chrome alloys according to the methodology adopted and the results obtained.
Indexing terms:shear strength; chromium alloys; chromium alloys
Texto completo: PDF
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