EFFECT OF PARTICLE SIZE ON THE FLEXURAL STRENGTH AND PHASE TRANSFORMATION OF AN AIRBORNE-PARTICLE ABRADED YTTRIA-STABILIZED TETRAGONAL ZIRCONIA POLYCRYSTAL CERAMIC

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorCtr Ceram Bologna-
Autor(es): dc.contributorAlma Mater Studiorum Univ Bologna-
Autor(es): dc.creatorFonseca, Renata Garcia [UNESP]-
Autor(es): dc.creatorAbi-Rached, Filipe de Oliveira [UNESP]-
Autor(es): dc.creatorSantos Nunes Reis, Jose Mauricio dos [UNESP]-
Autor(es): dc.creatorRambaldi, Elisa-
Autor(es): dc.creatorBaldissara, Paolo-
Data de aceite: dc.date.accessioned2022-02-22T00:06:57Z-
Data de disponibilização: dc.date.available2022-02-22T00:06:57Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2013-12-01-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/195815-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/195815-
Descrição: dc.descriptionStatement 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.descriptionSao Paulo State Univ UNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, Araraquara, SP, Brazil-
Descrição: dc.descriptionCtr Ceram Bologna, Bologna, Italy-
Descrição: dc.descriptionAlma Mater Studiorum Univ Bologna, Sch Dent, Div Prosthodont, Dept Oral Sci, Bologna, Italy-
Descrição: dc.descriptionSao Paulo State Univ UNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, Araraquara, SP, Brazil-
Formato: dc.format510-514-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B.V.-
Relação: dc.relationJournal Of Prosthetic Dentistry-
???dc.source???: dc.sourceWeb of Science-
Título: dc.titleEFFECT 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.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.