CaO-P2O5 class ceramics containing bioactive phases: Crystallisation and in vitro bioactivity studies

• Tipo: Artigo em Revista Científica Internacional
• Data: 2000

Autores

Y. Zhang (Autor) Outra; Maria Ascensão Lopes (Autor) FEUP; José Domingos Santos (Autor) FEUP

Revista

Título: Bioceramics

Vol. 49

Páginas: 643-646

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 4 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-001-16F

DOI: 10.4028/www.scientific.net/KEM.192-195.643

Abstract (EN): CaO-P2O5 glass ceramics were prepared using a two-step heat treatment of nucleation and crystal growth using TiO2 and Na2O as nucleating agents. X-ray diffraction analysis demonstrated that bioactive and bioresorbable crystalline phases were precipitated in the microstructure, depending upon the relative content of the additives and of the CaO/P2O5 ratio of the glass. Ca2P2O7 (beta -DCP) was the main crystalline phase however beta -Ca-3(PO4)(2) (beta -TCP), could also be formed by increasing the content of TiO2 and the CaO/P2O5 ratio. Na and Ti-containing phases, CaTi4(PO4)(6), and/or NaTi2(PO4)(3), could also be assigned in the XRD spectra, In vitro testing in simulated body fluid (SBF) has proved the in vitro bioactivity of these glass ceramics with the formation of Ca-deficient apatite crystals, as demonstrated by Scanning Electron Microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) analyses.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4