Effect of bioglass additions on the sintering of Y-TZP bioceramics

Autor(es)

Habibe, A. F. ^[1] ; Maeda, L. D. ^[1] ; Souza, R. C. ^[1] ; Barboza, M. J. R. ^[1] ; Daguano, J. K. M. F. ^[1] ; Rogero, S. O. ^[2] ; Santos, C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Engn Lorena, BR-12600970 Lorena, SP - Brazil

^[2] IPEN CNEN SP, BR-05508900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Science & Engineering C-Materials for Biological Applications; v. 29, n. 6, p. 1959-1964, AUG 1 2009.
• Citações Web of Science: 19

Resumo

The objective of this work was to evaluate the influence of bioglass additions on the sintering and mechanical properties of yttria-stabilized zirconia ceramics, Y-TZP Samples containing different bioglass additions, varying between 0 and 30 wt.%, were cold uniaxial pressed at 80 MPa and sintered in air at 1200 degrees C or 1300 degrees C for 120 min. Sintered samples were characterized by X-ray Diffractometry and Scanning Electron Microscopy. Hardness and fracture toughness were determined using Vickers indentation method. As a preliminary biological evaluation, in vitro cytotoxicity tests by Neutral Red Uptake method (using mouse connective tissue cells, NCTC clone L929 from ATCC bank) were realized to determine the cytotoxicity level of ZrO(2)-bioglass ceramics. The increasing of bioglass amount leads to the decreasing of relative density due to martensitic (tetragonal-monoclinic) transformation during cooling of the sintered samples. Y-TZP samples sintered at 1300 degrees C containing 5 wt.% of bioglass presented the best results. with high relative density, hardness and fracture toughness of 11.3 GPa and 6.1 MPa m(1/2), respectively. Furthermore, the un-cytotoxic behavior was observed in all sintering conditions and bioglass amounts used in this study. (C) 2009 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 06/50510-1 - Avaliação da resistência à fratura e estatística de Weibull de cerâmica a base de zircônia sinterizada com biovidros
• Beneficiário: Loriane David Maeda
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 04/04386-1 - Desenvolvimento e caracterização de pilares cerâmicos biocompatíveis à base de compósitos Zr02-Al2O3
• Beneficiário: Claudinei dos Santos
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores