Shear bond strength in porcelain-metal restorations

Malhotra, Manohar L.; Maickel, Lawrence B.

doi:10.1016/0022-3913(80)90208-5

Cited by 19 publications

(11 citation statements)

References 6 publications

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“…Moreover, the influence of water and fatigue caused by cyclic loading is considered an important factor in the durability of these restorations. 16 The most frequent failures are due to the presence of cracks inside the ceramics, which could occur due to stress generated by the different heat expansion coefficients between metal and porcelain, 8,17,33,34 technical errors, such as the incorporation of air bubbles during preparation, contributing to weakening and eventual fracture of the ceramic. Lack of support for the ceramic and an incorrect preparation of the abutment teeth are factors that cannot be ignored when mentioning clinical failures.…”

Section: Discussionmentioning

confidence: 99%

Influence of Surface Treatment on the Shear Bond Strength of Ceramics Fused to Cobalt-Chromium

Lombardo

Nishioka

Souza

et al. 2010

Journal of Prosthodontics

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Section: Discussionmentioning

confidence: 99%

Influence of Surface Treatment on the Shear Bond Strength of Ceramics Fused to Cobalt-Chromium

Lombardo

Nishioka

Souza

et al. 2010

Journal of Prosthodontics

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“…Thus, the performance of the metalceramic interface of these alloys must be evaluated and, in according to the alloy used the present study, two commercial brands were evaluated. Adhesion between ceramic and metallic base is a crucial point for clinical success, because a very complex stress situation occurs in the metal-ceramic interface 23 , with the tendency of cracks in this region 4,5,7,17,18 . Several tests are capable of evaluating the metal-ceramic bond strength, such as flexural mode, twist, shear, tension or the combination of flexural and twist modes 10 , all presenting advantages and disadvantages.…”

Section: Discussionmentioning

confidence: 99%

“…The success of the ceramometal restorations depends on the strength and integrity of the adhesion between metal and porcelain, the most susceptible site for occurrence of cracks 4,5,7,17,18 . The cracks generally progress through the metal/ceramic interface or through the covering porcelain 5,23 .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the shear bond strength of the union between two CoCr-alloys and a dental ceramic

et al. 2004

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EVALUATION OF THE SHEAR BOND STRENGTH OF THE UNION BETWEEN TWO CoCr-ALLOYS AND A DENTAL CERAMICNTRODUCTION: Based on the importance of the integrity of the metal/ceramic interface, the purpose of this work was to evaluate the shear bond strength of the metal-ceramic union of two Co-Cr alloys (Wirobond C, Bego; Remanium 2000, Dentaurum) combined with Omega 900 ceramic (Vita Zahnfabrik). MATERIAL and METHOD: Eleven cylindrical matrixes were made for each alloy, and the metallic portion was obtained with the lost wax casting technique with standardized waxing of 4mm of height and of 4mm of diameter. The ceramic was applied according to the manufacturer's recommendations with the aid of a teflon matrix that allowed its dimension to be standardized in the same size as the metallic portion. The specimens were submitted to the shear bond test in an universal testing machine (EMIC), with the aid of a device developed for such intention, and constant speed of 0.5mm/min. RESULTS and CONCLUSIONS: The mean resistance was 48.387MPa for Wirobond C alloy, with standard deviation of 17.718, and 55.956MPa for Remanium 2000, with standard deviation of 17.198. No statistically significant difference was observed between the shear strength of the two metal-ceramic alloys. Uniterms: Ceramics; Shear test; Alloys NTRODUÇÃO: Baseados na importância da integridade da interface metal-cerâmica, este trabalho tem como objetivo avaliar a resistência ao cisalhamento da união metal-cerâmica de duas ligas de Co-Cr (Wirobond C, Bego; Remanium 2000, Dentaurum) combinadas com a cerâmica Omega 900 (Vita Zahnfabrik). MATERIAIS E MÉTODOS: Foram confeccionados 11 corpos-de-prova cilíndricos para cada liga utilizada, sendo que a porção metálica foi obtida por fundição pela técnica da cera perdida, através de enceramentos padronizados com 4mm de altura por 4mm de diâmetro. A aplicação da cerâmica foi realizada segundo recomendações do fabricante, com auxílio de uma matriz de teflon que permitia sua padronização com as mesmas dimensões da porção metálica. Os corpos-de-prova foram submetidos ao ensaio de resistência ao cisalhamento em máquina de ensaios universal (EMIC), com auxílio de dispositivo desenvolvido para tal propósito, sob velocidade constante de 0,5mm/ min. RESULTADOS E CONCLUSÕES: As médias de resistência obtidas foram 48,387 MPa para a liga Wirobond C, com desvio padrão de 17,718, e 55,956 MPa para a Remanium 2000, com desvio padrão de 17,198. Após análise de variância foi possível observar que não há diferença estatisticamente significante entre os valores de resistência ao cisalhamento das duas ligas metalocerâmicas.

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“…They frequently to test different combinations of indicate, however, that the bond strength values materials, surface treatments, etc. (2,5,8,10,11, are in the range of 10-30 MPa and thus quite 13,17). The bond strength values obtained with different from those mentioned above (14,16).…”

mentioning

confidence: 72%

Bond strength of porcelain to dental alloys – an evaluation of two test methods

Oilo

Johansson

Syverud

1981

European J Oral Sciences

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– Two methods for measuring shear strengh of the porcelain‐metal interface, a rod/disk‐push test and a cube/cube‐push test, were compared using the same metals and porcelain material. Both types of specimen showed evidence of complex stress distribution at the interface during loading and fracture line located mainly in the opaque porcelain layer. Both methods were thusmainly a test of the “strength” of the porcelain at the interface. The “Bond strength values” obtained with the rod/disk specimen seemed to depend on the geometry of specimen and the values obtained with the cube/cube specimen scemed to depend on the quality of the porcelain work. It seem questionable whether “bone strenghth values” as obtained with these two methods can be the basis for requirenments in a standard for porcelain‐metal systems.

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Shear bond strength in porcelain-metal restorations

Cited by 19 publications

References 6 publications

Influence of Surface Treatment on the Shear Bond Strength of Ceramics Fused to Cobalt-Chromium

Influence of Surface Treatment on the Shear Bond Strength of Ceramics Fused to Cobalt-Chromium

Evaluation of the shear bond strength of the union between two CoCr-alloys and a dental ceramic

Bond strength of porcelain to dental alloys – an evaluation of two test methods

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