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Effect of titania content and biomimetic coating on the mechanical properties of the Y-TZP/TiO2 composite.
Miranda, Ranulfo Benedito de Paula; Miranda, Walter Gomes; Lazar, Dolores Ribeiro Ricci; Ussui, Valter; Marchi, Juliana; Cesar, Paulo Francisco.
Afiliação
  • Miranda RBP; Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, SP, Brazil.
  • Miranda WG; Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, SP, Brazil.
  • Lazar DRR; Centro de Ciência e Tecnologia de Materiais, Instituto de Pesquisas Energéticas e Nucleares, São Paulo, SP, Brazil.
  • Ussui V; Centro de Ciência e Tecnologia de Materiais, Instituto de Pesquisas Energéticas e Nucleares, São Paulo, SP, Brazil.
  • Marchi J; Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil.
  • Cesar PF; Departamento de Biomateriais e Biologia Oral, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, SP, Brazil. Electronic address: paulofc@usp.br.
Dent Mater ; 34(2): 238-245, 2018 02.
Article em En | MEDLINE | ID: mdl-29183671
OBJECTIVE: To investigate the effect of titania addition (0, 10 and 30mol%) on the microstructure, relative density, Young's modulus (E), Poisson's ratio (υ), mechanical properties (flexural strength, σf, and Weibull modulus, m) of a Y-TZP/TiO2 composite. The effect of the presence of a biomimetic coating on the microstructure and mechanical properties was also evaluated. METHODS: Y-TZP (3mol% of yttria) and Y-TZP/TiO2 composite (10 or 30mol% of titania) were synthesized by co-precipitation. The powders were pressed and sintered at 1400°C/2h. The surfaces, with and without biomimetic coating, were characterized by X-ray diffraction analysis and scanning electron microscopy. The relative density was measured by the Archimedes' principle. E and υ were measured by ultrasonic pulse-echo method. For the mechanical properties the specimens (n=30 for each group) were tested in a universal testing machine. RESULTS: Titania addition increased the grain size of the composite and caused a significant decrease in the flexural strength (in MPa, control 815.4a; T10 455.7b and T30 336.0c), E (in GPa, control 213.4a; T10 155.8b and T30 134.0c) and relative density (control 99.0%a; T10 94.4%c and T30 96.3%b) of the Y-TZP/TiO2 composite. The presence of 30% titania caused substantial increase in m and υ. Biomimetic coating did not affect the mechanical properties of the composite. SIGNIFICANCE: The Y-TZP/TiO2 composite coated with a layer of CaP has great potential to be used as implant material. Although addition of titania affected the properties of the composite, the application of a biomimetic coating did not jeopardize its reliability.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Titânio / Ítrio / Zircônio / Biomimética / Materiais Dentários Idioma: En Revista: Dent Mater Assunto da revista: ODONTOLOGIA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Titânio / Ítrio / Zircônio / Biomimética / Materiais Dentários Idioma: En Revista: Dent Mater Assunto da revista: ODONTOLOGIA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido