Fluoride release process of (resin-modified) glass-ionomer cements versus (polyacid-modified) composite resins.
The fluoride release of conventional and resin-modified glass-ionomers is reviewed and compared to that of fluoride-releasing (polyacid-modified) composite resins. Each formulation displays a typical fluoride release profile. The cumulative amount of fluoride released is described by [F]c = [F](I)t/(t + t1/2) + beta square root t for glass ionomers whether resin-modified or not, whereas for composite resins this quantity is given by [F]c = [F](I)t/(t + t1/2) + alpha t. Both equations indicate that two kinetic processes are responsible for the fluoride release profiles. The kinetic parameters [F](I), t1/2, beta and alpha depend on the formulation. On the basis of the exchange characteristics for fluoride, an attempt is made to explain the mechanisms responsible for these fluoride release processes.
Verbeeck
R M
RM
Department of Dental Materials, Dental School, University of Ghent, Gent, Belgium. Ronald.Verbeeck@rug.ac.be
De Maeyer
E A
EA
Marks
L A
LA
De Moor
R J
RJ
De Witte
A M
AM
Trimpeneers
L M
LM
D000143:Acids; D001672:Biocompatible Materials / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D007700:Kinetics
D000143:Acids; D001672:Biocompatible Materials; D003188:Composite Resins; D005899:Glass Ionomer Cements; D005459:Fluorides