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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.contributor | Ctr Ceram Bologna | - |
Autor(es): dc.contributor | Alma Mater Studiorum Univ Bologna | - |
Autor(es): dc.creator | Fonseca, Renata Garcia [UNESP] | - |
Autor(es): dc.creator | Abi-Rached, Filipe de Oliveira [UNESP] | - |
Autor(es): dc.creator | Santos Nunes Reis, Jose Mauricio dos [UNESP] | - |
Autor(es): dc.creator | Rambaldi, Elisa | - |
Autor(es): dc.creator | Baldissara, Paolo | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:06:57Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:06:57Z | - |
Data de envio: dc.date.issued | 2020-12-09 | - |
Data de envio: dc.date.issued | 2020-12-09 | - |
Data de envio: dc.date.issued | 2013-12-01 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/195815 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/195815 | - |
Descrição: dc.description | Statement of problem. Because airborne-particle abrasion is an efficient method of improving the bond at the zirconiacement interface, understanding its effect on the strength of yttria-stabilized tetragonal zirconia polycrystal is important. Purpose. The purpose of this study was to evaluate the effect of the particle size used for airborne-particle abrasion on the flexural strength and phase transformation of a commercially available yttria-stabilized tetragonal zirconia polycrystal ceramic. Material and Methods. For both flexural strength (20.0 x 4.0 x 1.2 mm) (n=14) and phase transformation (14.0-mm diameter x 1.3-mm thickness) (n=4), the zirconia specimens were made from Lava, and their surfaces were treated in the following ways: as-sintered (control); with 50-mu m aluminum oxide (Al2O3) particles; with 120-mu m Al2O3 particles; with 250 gm Al2O3 particles; with 30-mu m silica-modified Al2O3 particles (Cojet Sand); with 120-mu m Al2O3 particles, followed by 110 gm silica-modified Al2O3 particles (Rocatec Plus); and with Rocatec Plus. The phase transformation (%) was assessed by x-ray diffraction analysis. The 3-point flexural strength test was conducted in artificial saliva at 37 degrees C in a mechanical testing machine. The data were analyzed by 1-way ANOVA and the Tukey honestly significant difference post hoc test (alpha=.05). Results. Except for the Cojet Sand group, which exhibited statistically similar flexural strength to that of the as-sintered group and for the group abraded with 250-mu m Al2O3 particles, which presented the lowest strength, airborne-particle abrasion with the other particle sizes provided the highest values, with no significant difference among them. The as-sintered specimens presented no monoclinic phase. The groups abraded with smaller particles (30 mu m and 50 mu m) and those treated with the larger ones (110 mu m and/or 120 mu m particles and 250 mu m) exhibited percentages of monoclinic phase that varied from 4% to 5% and from 8.7% to 10%. Conclusions. Except for abrasion with Cojet Sand, depending on the particle size, zirconia exhibited an increase or a decrease in its flexural strength. Airborne-particle abrasion promoted phase transformation (tetragonal to monoclinic), and the percentage of monoclinic phase varied according to the particle size. | - |
Descrição: dc.description | Sao Paulo State Univ UNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, Araraquara, SP, Brazil | - |
Descrição: dc.description | Ctr Ceram Bologna, Bologna, Italy | - |
Descrição: dc.description | Alma Mater Studiorum Univ Bologna, Sch Dent, Div Prosthodont, Dept Oral Sci, Bologna, Italy | - |
Descrição: dc.description | Sao Paulo State Univ UNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, Araraquara, SP, Brazil | - |
Formato: dc.format | 510-514 | - |
Idioma: dc.language | en | - |
Publicador: dc.publisher | Elsevier B.V. | - |
Relação: dc.relation | Journal Of Prosthetic Dentistry | - |
???dc.source???: dc.source | Web of Science | - |
Título: dc.title | EFFECT OF PARTICLE SIZE ON THE FLEXURAL STRENGTH AND PHASE TRANSFORMATION OF AN AIRBORNE-PARTICLE ABRADED YTTRIA-STABILIZED TETRAGONAL ZIRCONIA POLYCRYSTAL CERAMIC | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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