title: Degradative analysis of glass ionomer polyelectrolyte cements.
abstract: As part of a detailed investigation of the setting mechanisms of dental polyelectrolyte cements, the Al3+, Ca2+, and Na+ concentrations in the matrix phase of glass ionomer cements were measured as a function of the cements age by use of a selective degradation technique. In the early stages of cement formation, all three cations were rapidly released from the glass, and it is inferred that both Ca2+ and Al3+ are responsible for gelation. Even after 5 X 10(4) min, the reaction was incomplete and still continuing.
mesh_terms: D000535:Aluminum / Q000032:analysis; D002118:Calcium / Q000032:analysis; D002412:Cations / Q000032:analysis; D003738:Dental Cements / Q000032:analysis*; D004573:Electrolytes / Q000032:analysis; D005899:Glass Ionomer Cements / Q000032:analysis*; D011108:Polymers / Q000032:analysis; D012964:Sodium / Q000032:analysis
chemical_list: D002412:Cations; D003738:Dental Cements; D004573:Electrolytes; D005899:Glass Ionomer Cements; D011108:Polymers; D012964:Sodium; D000535:Aluminum; D002118:Calcium