Influence of fluid circulation on in vitro reactivity of bioactive glass particles

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Zhang D, Hupa M, Aro HT, Hupa L
Förläggare: ELSEVIER SCIENCE SA
Publiceringsår: 2008
Tidskrift: Materials Chemistry and Physics
Tidskriftsakronym: MATER CHEM PHYS
Volym: 111
Nummer: 2-3
Artikelns första sida, sidnummer: 497
Artikelns sista sida, sidnummer: 502
Antal sidor: 6
ISSN: 0254-0584


Abstrakt

The influence of circulation of simulated body fluid (SBF) on the in vitro behavior of glass particles (500-800 mu m) was studied for seven glasses by measuring in situ pH inside the particle beds at 37 degrees C. Reaction layers on particle surfaces were characterized with SEM/EDXA. Differences in the tendency to form reaction layers on surfaces at different locations in the particle beds were determined using samples, with interconnected porosity prepared by sintering the particles. Circulation of the solution above the particle bed affected strongly the in vitro behavior of the particles. Due to poor diffusion, the static conditions led to high pH in the SBF within the particle beds and uneven layer formation on the particles. Fluid circulation above the particle beds resulted in a homogenous environment lacking the pronounced pH gradients seen in the static system. The reaction layers on the particles were uniform but thin in the circulating conditions.


Nyckelord

fluid circulation, in vitro test, particles, SBF

Senast uppdaterad 2019-12-11 vid 02:58