Influence of thermal treatment on the "in vitro" bioactivity of wollastonite materials

被引：21

作者：

de la Casa-Lillo, Miguel A. ^{[1
]}

Velasquez, Pablo ^{[1
]}

De Aza, Piedad N. ^{[1
]}

机构：

[1] Univ Miguel Hernandez, Dept Ciencia Mat Opt Tecnol Elect, Elect nica Inst Bioingn, Alicante, Spain

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE | 2011年 / 22卷 / 04期

关键词：

HUMAN PAROTID-SALIVA; SIMULATED BODY-FLUIDS; P-RICH LAYER; GLASS-CERAMICS; PSEUDOWOLLASTONITE; BONE; SURFACE; SYSTEM; IMPLANTS; BIOCOMPATIBILITY;

D O I：

10.1007/s10856-011-4254-2

中图分类号：

R318 [生物医学工程];

学科分类号：

100103 [病原生物学];

摘要：

The aim of this work was to study the influence of the composition and thermal treatment of the in vitro bioactivity of wollastonite materials obtained by sol-gel method. For this purpose, gels in the system SiO(2)-CaO were obtained applying calcium nitrate and tetraethoxysilicate as precursors. The gels were heated to 700A degrees C and then sintered up to 1400A degrees C. The bioactivity of the gel-derived materials in simulated body fluid (SBF) was investigated and characterized. Additional changes in ionic concentration, using inductively couple plasma atomic emission spectroscopy (ICP-AES), were determined. The results showed that all materials obtained were bioactive and indicate that the absence of phosphorous in the material composition is not an essential requirement for the development of a Hydroxyapatite layer. The bioactivity was influenced by the thermal treatment, the different phases (glass-phase, wollastonite and pseudowollastonite) as well as the porous size. On the gel-derived materials the bioactivity decreased with the sintering temperature.

引用

页码：907 / 915

页数：9

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