Effect of thermocycling aging on the flexural strength of feldspathic ceramic
Objective: The aim of the study was to evaluate the effect of aging through different thermocycling protocols on the flexural strength of a feldspathic ceramic. Material and Methods: Fifty ceramic bars, Vitablock Mark II (VITA), with dimensions of 18X4X2mm were prepared. The bars were randomly dist...
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| Language: | English |
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Universidade Estadual Paulista
2018-08-01
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| Series: | Brazilian Dental Science |
| Online Access: | https://ojs.ict.unesp.br/index.php/cob/article/view/1554 |
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| author | Ronaldo Lúís Almeida de Carvalho Estevão Tomomitsu kimpara Eduardo Bresciani Márcia Carneiro Valera Renata Marques Melo |
| author_facet | Ronaldo Lúís Almeida de Carvalho Estevão Tomomitsu kimpara Eduardo Bresciani Márcia Carneiro Valera Renata Marques Melo |
| author_sort | Ronaldo Lúís Almeida de Carvalho |
| collection | DOAJ |
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Objective: The aim of the study was to evaluate the effect of aging through different thermocycling protocols on the flexural strength of a feldspathic ceramic. Material and Methods: Fifty ceramic bars, Vitablock Mark II (VITA), with dimensions of 18X4X2mm were prepared. The bars were randomly distributed to the groups (n = 10), which were defined according to the number of thermal cycles (TCy): G0 - no TCy; G500 - 500 cycles of TCy; G6000 - 6000 TCy; G10000 - 10000 TCy; G15000 - 15000 TCy. After aging, the specimens were subjected to the three point bending test in a universal testing machine (EMIC DL 1000), under 0.5mm/min speed and loading of 50kgf, until catastrophic failure. A sample of each group was evaluated for topographic morphology under Scanning Electron Microscopy. Results: For mechanical testing, the following mean values and standard deviation (MPa) were obtained: G0 (99.78 ± 5.07); G500 (101.64 ± 5.59); G6000 (98.13 ± 4.95); G10000 (91.77 ± 9.68); G15000 (101.51 ± 4.22). An analysis of variance by regression equation (p = 0.387) was performed, demonstrating a weak and non-significant correlation between flexural strength and number of thermal cycles. Conclusion: It can be concluded that aging in water solely by different numbers of temperature cycles did not influence on the flexural strength of a feldspathic ceramic.
Keywords
Material resistance; Aging; Ceramics.
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| format | Article |
| id | doaj-art-51e83abedffe4885b7828149623e81f9 |
| institution | Kabale University |
| issn | 2178-6011 |
| language | English |
| publishDate | 2018-08-01 |
| publisher | Universidade Estadual Paulista |
| record_format | Article |
| series | Brazilian Dental Science |
| spelling | doaj-art-51e83abedffe4885b7828149623e81f92025-08-22T19:02:23ZengUniversidade Estadual PaulistaBrazilian Dental Science2178-60112018-08-0121310.14295/bds.2018.v21i3.1554Effect of thermocycling aging on the flexural strength of feldspathic ceramicRonaldo Lúís Almeida de Carvalho0Estevão Tomomitsu kimpara1Eduardo Bresciani2Márcia Carneiro Valera3Renata Marques Melo4São Paulo State University (Unesp) – Institute of Science and Technology – Department of Dental Materials and Prosthodontics – São José dos Campos – SP – Brazil.São Paulo State University (Unesp) – Institute of Science and Technology – Department of Dental Materials and Prosthodontics – São José dos Campos – SP – Brazil.São Paulo State University (Unesp) – Institute of Science and Technology – Department of Restorative Dentistry – São José dos Campos – SP – Brazil.São Paulo State University (Unesp) – Institute of Science and Technology – Department of Restorative Dentistry – São José dos Campos – SP – Brazil.São Paulo State University (Unesp) – Institute of Science and Technology – Department of Dental Materials and Prosthodontics – São José dos Campos – SP – Brazil. Objective: The aim of the study was to evaluate the effect of aging through different thermocycling protocols on the flexural strength of a feldspathic ceramic. Material and Methods: Fifty ceramic bars, Vitablock Mark II (VITA), with dimensions of 18X4X2mm were prepared. The bars were randomly distributed to the groups (n = 10), which were defined according to the number of thermal cycles (TCy): G0 - no TCy; G500 - 500 cycles of TCy; G6000 - 6000 TCy; G10000 - 10000 TCy; G15000 - 15000 TCy. After aging, the specimens were subjected to the three point bending test in a universal testing machine (EMIC DL 1000), under 0.5mm/min speed and loading of 50kgf, until catastrophic failure. A sample of each group was evaluated for topographic morphology under Scanning Electron Microscopy. Results: For mechanical testing, the following mean values and standard deviation (MPa) were obtained: G0 (99.78 ± 5.07); G500 (101.64 ± 5.59); G6000 (98.13 ± 4.95); G10000 (91.77 ± 9.68); G15000 (101.51 ± 4.22). An analysis of variance by regression equation (p = 0.387) was performed, demonstrating a weak and non-significant correlation between flexural strength and number of thermal cycles. Conclusion: It can be concluded that aging in water solely by different numbers of temperature cycles did not influence on the flexural strength of a feldspathic ceramic. Keywords Material resistance; Aging; Ceramics. https://ojs.ict.unesp.br/index.php/cob/article/view/1554 |
| spellingShingle | Ronaldo Lúís Almeida de Carvalho Estevão Tomomitsu kimpara Eduardo Bresciani Márcia Carneiro Valera Renata Marques Melo Effect of thermocycling aging on the flexural strength of feldspathic ceramic Brazilian Dental Science |
| title | Effect of thermocycling aging on the flexural strength of feldspathic ceramic |
| title_full | Effect of thermocycling aging on the flexural strength of feldspathic ceramic |
| title_fullStr | Effect of thermocycling aging on the flexural strength of feldspathic ceramic |
| title_full_unstemmed | Effect of thermocycling aging on the flexural strength of feldspathic ceramic |
| title_short | Effect of thermocycling aging on the flexural strength of feldspathic ceramic |
| title_sort | effect of thermocycling aging on the flexural strength of feldspathic ceramic |
| url | https://ojs.ict.unesp.br/index.php/cob/article/view/1554 |
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