ISSN:
0021-9304
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Medicine
,
Technology
Notes:
In vitro reaction kinetics of surface transformations of porous and dense bioactive ceramics were studied after immersion in simulated physiologic solution (SPS). Porous ceramics with identical macroporosity were commercially obtained: calcium carbonate marine coral (I-CC), coralline HA (I-HA), and a product, labeled as β-tricalcium phosphate, which was partially transformed into β-calcium pyrophosphate (I-β-CP). Previously studied dense ceramics were used for comparison: Ca-deficient HA (CDHA), stoichiometric HA, both well and not well crystallized (wc and nwc s-HA), β-and α-tricalcium phosphate (β- and α-TCP). The induction time to precipitation increased as follows: CDHA, nec HA 〈 wc HA, I-HA 〈 β-TCP, I-CC 〈 I-β-CP. The reaction kinetics of ceramics with identical macroporosity varied substantially depending on composition, crystal structure, and ultrastructure. One of the porous ceramics, I-β-CP, showed an inhibiting effect on precipitation reactions. © 1994 John Wiley & Sons, Inc.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jbm.820281108
Permalink
