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Characterization of Conventional and High-Translucency Y-TZP Dental Ceramics Submitted to Air Abrasion.
Tostes, Bhenya Ottoni; Guimarães, Renato Bastos; Noronha-Filho, Jaime Dutra; Botelho, Glauco Dos Santos; Guimarães, José Guilherme Antunes; Silva, Eduardo Moreira da.
Afiliação
  • Tostes BO; Analytical Laboratory of Restorative Biomaterials - LABiom-R, Dental School, UFF - Universidade Federal Fluminense, Niterói, RJ, Brazil.
  • Guimarães RB; Physics Institute, UFF - Universidade Federal Fluminense, Niterói, RJ, Brazil.
  • Noronha-Filho JD; Analytical Laboratory of Restorative Biomaterials - LABiom-R, Dental School, UFF - Universidade Federal Fluminense, Niterói, RJ, Brazil.
  • Botelho GD; Analytical Laboratory of Restorative Biomaterials - LABiom-R, Dental School, UFF - Universidade Federal Fluminense, Niterói, RJ, Brazil.
  • Guimarães JG; Analytical Laboratory of Restorative Biomaterials - LABiom-R, Dental School, UFF - Universidade Federal Fluminense, Niterói, RJ, Brazil.
  • Silva EM; Analytical Laboratory of Restorative Biomaterials - LABiom-R, Dental School, UFF - Universidade Federal Fluminense, Niterói, RJ, Brazil.
Braz Dent J ; 28(1): 97-104, 2017.
Article em En | MEDLINE | ID: mdl-28301026
This study evaluated the effect of air-abrasion on t®m phase transformation, roughness, topography and the elemental composition of three Y-TZP (Yttria-stabilized tetragonal zirconia polycrystal) dental ceramics: two conventional (Lava Frame and IPS ZirCad) and one with high-translucency (Lava Plus). Plates obtained from sintered blocks of each ceramic were divided into four groups: AS (as-sintered); 30 (air-abrasion with 30 mm Si-coated Al2O3 particles); 50 (air-abrasion with 50 mm Al2O3 particles) and 150 (air-abrasion with 150 mm Al2O3 particles). After the treatments, the plates were submitted to X-ray diffractometry; 3-D profilometry and SEM/EDS. The AS surfaces were composed of Zr and t phases. All treatments produced t®m phase transformation in the ceramics. The diameter of air-abrasion particles influenced the roughness (150>50>30>AS) and the topography. SEM analysis showed that the three treatments produced groove-shaped microretentions on the ceramic surfaces, which increased with the diameter of air-abrasion particles. EDS showed a decrease in Zr content along with the emergence of O and Al elements after air-abrasion. Presence of Si was also detected on the plates air-abraded with 30 mm Si-coated Al2O3 particles. It was concluded that irrespective of the type and diameter of the particles, air-abrasion produced t®m phase transformation, increased the roughness and changed the elemental composition of the three Y-TZP dental ceramics. Lava Plus also behaved similarly to the conventional Y-TZP ceramics, indicating that this high translucency ceramic could be more suitable to build monolithic ceramic restorations in the aesthetic restorative dentistry field.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cerâmica / Materiais Dentários Idioma: En Revista: Braz Dent J Assunto da revista: ODONTOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cerâmica / Materiais Dentários Idioma: En Revista: Braz Dent J Assunto da revista: ODONTOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil