Direct surface pH determinations of setting cements.
Surface pH measurements were made over a 24-hour period for several luting cements and glass-ionomer lining and restorative materials. Of the luting cements, the water-mixed glass-ionomer cement, Ketac-Cem, had the lowest initial pH and the polycarboxylate, Durelon, had the highest. Three glass-ionomer lining materials showed differences in pH that increased over the entire test period. Two of the three visible-light-cured glass-ionomer liners evaluated showed similar pH values, while the third exhibited a considerably lower pH. The lower pH values found with the water-mixed glass-ionomer luting agent suggest that acidity may contribute to the posttreatment sensitivity associated with this material.
Charlton
D G
DG
Department of Dental Materials, Indiana University School of Dentistry, Indianapolis 46202.
Moore
B K
BK
Swartz
M L
ML
D001840:Dental Bonding / Q000379:methods*; D003736:Dental Cavity Lining; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D011076:Polycarboxylate Cement / Q000737:chemistry*; D013499:Surface Properties; D013997:Time Factors; D015036:Zinc Phosphate Cement / Q000737:chemistry*
D005899:Glass Ionomer Cements; D011076:Polycarboxylate Cement; D015036:Zinc Phosphate Cement