Dental polyelectrolyte cements. I. Chemistry of the early stages of the setting reaction.
As part of an investigation of the setting of dental polyelectrolyte cements, the chemistry of a selection of glass ionomer and zinc polycarboxylate cements was studied by pH, conductivity and I.R. measurements. The zinc polycarboxylate cements were found to react at a greater rate than the glass ionomer cements. The effect of reducing the powder/liquid (P/L) ratio is to decrease the surface area available to attack and hence the reaction rate. The basic form of the kinetics appears to be unaffected except for low P/L ratios where there is a deficiency of available metal cations.
D055598:Chemical Phenomena; D002621:Chemistry; D003738:Dental Cements / Q000032:analysis; D004553:Electric Conductivity; D005899:Glass Ionomer Cements; D006863:Hydrogen-Ion Concentration; D011076:Polycarboxylate Cement / Q000032:analysis; D013055:Spectrophotometry, Infrared; D013997:Time Factors
D003738:Dental Cements; D005899:Glass Ionomer Cements; D011076:Polycarboxylate Cement