The influence of ultrasonic setting on fluoride release from glass polyalkenoate cements
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Glass polyalkenoate cements (GPCs) are formed by the reaction of an ion leachable alumino-silicate glass with an aqueous solution of poly(alkenoic) acid (PAA). Water is used as the reaction medium. This acid–base reaction, whereby the acid attacks and degrades the glass structure, results in the formation of a hydrogel polysalt matrix .
GPCs can be formulated to release fluoride [2, 3] and this can remineralise enamel and softened dentine . Fluoride release and its cariostatic effect will become more important with the increasing use of tooth saving preparation methods, such as tunnel techniques where there is a greater risk of leaving carious dentine behind than with conventional box cavities.
There is extensive literature on fluoride ion (F−) release from GPCs [5, 6, 7]. However, there is little consensus on the possible mechanism of release, or the relationship between glass composition and release rates. Kuhn and Wilson  hypothesized that F−release occurs principally by...
KeywordsCavitation Aluminosilicate Glass Carious Dentine Fluoride Release Glass Polyalkenoate Cement
The authors gratefully acknowledge the financial support of the Enterprise Ireland Technology Development Program (‘Proof of Concept’ phase, PoC/2003/018).
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