Surface roughness and volumetric contraction of a Y-TZP ceramic sintered by microwave energy and by resistive heating
Objective: The aim of this study was to evaluate a Y-TZP ceramic sintered by a microwave protocol on volume shrinkage and surface roughness. Material and Methods: Twenty four (N=24) Y-TZP discs were fabricated by milling in CAD/CAM for size standardization. The mean final dimensions of the specimen...
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| Format: | Article |
| Language: | English |
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Universidade Estadual Paulista
2017-12-01
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| Series: | Brazilian Dental Science |
| Online Access: | https://ojs.ict.unesp.br/index.php/cob/article/view/1481 |
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| author | Nayara Fernanda Barchetta Larissa Guazzelli Nanni Jean Soares Miranda Dolores Ribeiro Ricci Lazar Valter Assui Guilherme de Siqueira Ferreira Anzalone Saavedra |
| author_facet | Nayara Fernanda Barchetta Larissa Guazzelli Nanni Jean Soares Miranda Dolores Ribeiro Ricci Lazar Valter Assui Guilherme de Siqueira Ferreira Anzalone Saavedra |
| author_sort | Nayara Fernanda Barchetta |
| collection | DOAJ |
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Objective: The aim of this study was to evaluate a Y-TZP ceramic sintered by a microwave protocol on volume shrinkage and surface roughness. Material and Methods: Twenty four (N=24) Y-TZP discs were fabricated by milling in CAD/CAM for size standardization. The mean final dimensions of the specimens were 15 mm X 1.6 mm. Samples were divided into 2 groups (n=12): conventional resistive heating sintering protocol (C - Control) and microwave sintering protocol (MO - experimental). For the characterization of the specimens, surface roughness (Ra and Rz parameters) was evaluated with a roughness tester, and volume shrinkage was measured with a hand micrometer. Data were statistically evaluated by Student’s t and Mann-Whitney U tests (?=0.05). Results: The roughness results were: 0.25 ?m ± 0.02 (Ra) and 2.68 ?m ± 0.666 (Rz) for the MO samples; 0.26 ?m ± 0.04 (Ra) and 2.73 ?m ± 0.461 (Rz) for the C group (Ra: p = 0.19; Rz: p = 0.81). The shrinkage results was: MO (21.02% ± 2.70) and C (20.10% ± 0.52) (p = 0.274). Conclusion: The conventional and microwave sintering methods were similar regarding surface roughness and volume shrinkage of Y-TZP dental ceramic.
Keywords
Bioceramics; Microwave sintering; Roughness surface; Zirconia.
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| format | Article |
| id | doaj-art-0c1b13cca456464f9b2a8bfc3c9266ed |
| institution | Kabale University |
| issn | 2178-6011 |
| language | English |
| publishDate | 2017-12-01 |
| publisher | Universidade Estadual Paulista |
| record_format | Article |
| series | Brazilian Dental Science |
| spelling | doaj-art-0c1b13cca456464f9b2a8bfc3c9266ed2025-08-22T19:03:17ZengUniversidade Estadual PaulistaBrazilian Dental Science2178-60112017-12-0120410.14295/bds.2017.v20i4.1481Surface roughness and volumetric contraction of a Y-TZP ceramic sintered by microwave energy and by resistive heatingNayara Fernanda Barchetta0Larissa Guazzelli Nanni1Jean Soares Miranda2Dolores Ribeiro Ricci Lazar3Valter Assui4Guilherme de Siqueira Ferreira Anzalone Saavedra5São Paulo State University (Unesp) – Institute of Science and Technology – São José dos Campos – Department of Dental Materials and Prosthodontics – SP – Brazil.São Paulo State University (Unesp) – Institute of Science and Technology – São José dos Campos – SP - Brazil.São Paulo State University (Unesp) – Institute of Science and Technology – São José dos Campos – Department of Dental Materials and Prosthodontics – SP – Brazil.Institute of Energy and Nuclear Research (IPEN) – São Paulo – SP – Brazil.Institute of Energy and Nuclear Research (IPEN) – São Paulo – SP – Brazil.São Paulo State University (Unesp) – Institute of Science and Technology – São José dos Campos – Department of Dental Materials and Prosthodontics – SP – Brazil. Objective: The aim of this study was to evaluate a Y-TZP ceramic sintered by a microwave protocol on volume shrinkage and surface roughness. Material and Methods: Twenty four (N=24) Y-TZP discs were fabricated by milling in CAD/CAM for size standardization. The mean final dimensions of the specimens were 15 mm X 1.6 mm. Samples were divided into 2 groups (n=12): conventional resistive heating sintering protocol (C - Control) and microwave sintering protocol (MO - experimental). For the characterization of the specimens, surface roughness (Ra and Rz parameters) was evaluated with a roughness tester, and volume shrinkage was measured with a hand micrometer. Data were statistically evaluated by Student’s t and Mann-Whitney U tests (?=0.05). Results: The roughness results were: 0.25 ?m ± 0.02 (Ra) and 2.68 ?m ± 0.666 (Rz) for the MO samples; 0.26 ?m ± 0.04 (Ra) and 2.73 ?m ± 0.461 (Rz) for the C group (Ra: p = 0.19; Rz: p = 0.81). The shrinkage results was: MO (21.02% ± 2.70) and C (20.10% ± 0.52) (p = 0.274). Conclusion: The conventional and microwave sintering methods were similar regarding surface roughness and volume shrinkage of Y-TZP dental ceramic. Keywords Bioceramics; Microwave sintering; Roughness surface; Zirconia. https://ojs.ict.unesp.br/index.php/cob/article/view/1481 |
| spellingShingle | Nayara Fernanda Barchetta Larissa Guazzelli Nanni Jean Soares Miranda Dolores Ribeiro Ricci Lazar Valter Assui Guilherme de Siqueira Ferreira Anzalone Saavedra Surface roughness and volumetric contraction of a Y-TZP ceramic sintered by microwave energy and by resistive heating Brazilian Dental Science |
| title | Surface roughness and volumetric contraction of a Y-TZP ceramic sintered by microwave energy and by resistive heating |
| title_full | Surface roughness and volumetric contraction of a Y-TZP ceramic sintered by microwave energy and by resistive heating |
| title_fullStr | Surface roughness and volumetric contraction of a Y-TZP ceramic sintered by microwave energy and by resistive heating |
| title_full_unstemmed | Surface roughness and volumetric contraction of a Y-TZP ceramic sintered by microwave energy and by resistive heating |
| title_short | Surface roughness and volumetric contraction of a Y-TZP ceramic sintered by microwave energy and by resistive heating |
| title_sort | surface roughness and volumetric contraction of a y tzp ceramic sintered by microwave energy and by resistive heating |
| url | https://ojs.ict.unesp.br/index.php/cob/article/view/1481 |
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