Polyacid-modified composite resins glass component

G.O. Adusei, S. Deb, J.W. Nicholson, The role of the ionomer glass component in polyacid-modified composite resin dental restorative materials, J. Mater. Sci. Mater. Med. 15 (2004) 751-754. 

Selection of the glass component of the filler blend in polyacid-modified composite resins appears straightforward. It needs to have a basic character, as in conventional glass-ionomers, and to be capable of reacting with the acid-functional monomer once sufficient water has been drawn into the set composite structure [21], However, there are also complications that need to be considered, from which it can be seen that the nature and incorporation of the ionomer glass component into polyacid-modified composite is not as straightforward as it appears at first sight. 

One of the properties of glass-ionomer cements that polyacid-modified composite resins are designed to possess is the ability to release fluoride. The reactive glass filler is an ionomer-type glass, and as such contains fluoride. This becomes available for release following its incorporation into the polysalt phase as a result of the moisture driven acid-base reaction with the acid-functional monomer component [1]. 

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