Short- and long-term fluoride release from glass ionomers and other fluoride-containing filling materials in vitro.
Test specimens of seven different glass ionomer filling materials and one fissure sealant were exposed to running water for 2 yr. One amalgam and one composite, both containing fluoride, were included for comparison. The fluoride release from the specimens was measured periodically after storing the specimens for 24 h or 1 wk in a small amount of water. The fluoride release from the glass ionomers decreased with time and a constant level was reached for most products during the 2-yr period. The release was increased by lowering the pH of the storage solution. The release from the glass ionomers was clearly greater than from the amalgam and the composite.
Forsten
L
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Institute of Dentistry, University of Turku, Finland.
D016722:Cermet Cements; D003188:Composite Resins; D003722:Dental Alloys; D003723:Dental Amalgam; D003738:Dental Cements; D005459:Fluorides; D005899:Glass Ionomer Cements; D008298:Maleates; D008422:Materials Testing; D010895:Pit and Fissure Sealants; D012823:Silicate Cement; D012834:Silver; D013997:Time Factors; D014867:Water
D016722:Cermet Cements; D003188:Composite Resins; D003722:Dental Alloys; D003738:Dental Cements; D005899:Glass Ionomer Cements; D008298:Maleates; D010895:Pit and Fissure Sealants; D014867:Water; C054101:ChemFil II; D012823:Silicate Cement; D012834:Silver; C031360:Sybraloy; C037885:Fuji-ionomer; D003723:Dental Amalgam; C040964:Ketac-Fil; D005459:Fluorides