𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Influence of P2O5 on crystallinity of apatite formedin vitro on surface of bioactive glasses

✍ Scribed by Vallet-Reg�, M. ;Izquierdo-Barba, I. ;Salinas, A. J.

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
548 KB
Volume
46
Category
Article
ISSN
0021-9304

No coin nor oath required. For personal study only.

✦ Synopsis

Two sol-gel glasses with 80 mol % SiO 2 were prepared in the system SiO 2 -CaO-P 2 O 5 ; the first one had 3 mol% P 2 O 5 in its composition, and the second one was P 2 O 5 free. The in vitro behavior of glasses was studied by soaking them in simulated body fluid for 7 days at 37°C. After the in vitro test, the study by Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive spectroscopy, electron diffraction, and transmission electron microscopy showed an apatite-like layer had formed on the surface of both glasses. However, for identical soaking time, the apatite crystals formed on the surface of the glass containing P 2 O 5 in the composition were larger. Therefore, the presence of P 2 O 5 in the sol-gel glass composition promotes the crystal growth of the apatite.

📜 SIMILAR VOLUMES

Influence of composition and surface cha
Influence of composition and surface characteristics on thein vitro bioactivity of SiO2?CaO?P2O5?MgO sol-gel glasses
✍ P�rez-Pariente, J. ;Balas, F. ;Rom�n, J. ;Salinas, A. J. ;Vallet-Reg�, M. 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 332 KB 👁 2 views

Glasses in the system SiO 2 -CaO-P 2 O 5 -MgO were prepared by the sol-gel method. These glasses featured SiO 2 contents in the range 60-80 mol %, 4 mol % of P 2 O 5 , and a CaO/MgO molar ratio of 4. Because of their composition and surface properties, all the glasses showed in vitro bioactivity, as

Characterization of apatite layer format
Characterization of apatite layer formation on P2O5-CaO, P2O5-CaO-Na2O, and P2O5-CaO-Na2O-Al2O3 glass hydroxyapatite composites
✍ Jha, L. J. ;Santos, J. D. ;Knowles, J. C. 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 735 KB

P2O5-based glass hydroxyapatite (HA) composites denoted HA-2 oxide, HA-3 oxide, and HA-4-oxide, were immersed in Hank's balanced salt solution for a period of 1, 2, 3, and 4 weeks at 37 degrees C in nonagitated condition for in vitro evaluation. A surface layer was precipitated on the composites tha

Effect of particulate bioactive glasses
Effect of particulate bioactive glasses on human macrophages and monocytes in vitro
✍ Richard M. Day; Aldo R. Boccaccini 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 173 KB 👁 2 views

## Abstract Bioactive glasses, originally developed to promote tissue adhesion, are finding an increasing array of biomedical applications. The aim of the current study was to assess the ability of silicate‐ and zinc phosphate‐based bioactive glasses to modulate the secretion of cytokines from acti

Effect of the substitution of La2O3 for
Effect of the substitution of La2O3 for CaO on the bioactivity of 2.5CaO � 2SiO2 glass
✍ Fresa, R. ;Costantini, A. ;Buri, A. ;Branda, F. 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 402 KB 👁 1 views

Glasses of the following composition were prepared: layer appears to be increasingly thinner with increasing (2.5-x)Ca0 . x/3La203 . 2Si02 (0 5 x 5 1). Their behavior amounts of La203 substituted. The experimental results are in when soaked in a simulated body fluid (SBF) was studied good agreement

The influence of alkali and alkaline ear
The influence of alkali and alkaline earths on the working range for bioactive glasses
✍ Brink, Maria 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 175 KB 👁 2 views

Viscosity-temperature dependence has been investigated for glasses in a system where bioactive compositions are found. A glass is called bioactive when living bone can bond to it. In this work, high-temperature microscopy was used to determine viscosity-temperature behavior for 40 glasses in the sys