Characterization of the development of elasticity in dental luting cements.
OBJECTIVE
The development of elasticity of dental luting cements was investigated as an indicator of working and setting time.


METHODS
A displacement rheometer was used to monitor the development of elasticity. Three luting cements were examined.


RESULTS
The initial onset of elasticity in the glass-ionomer and polycarboxylate cements did approximate the manufacturer's quoted working times. The onset of elasticity did not appear to define a clinically useful working time for the zinc phosphate cement.


CONCLUSIONS
The development of elasticity in luting cements as a measure of working time was not universally relevant. The demonstration of the presence of elasticity in some cements may have consequences for cementation and all ceramic crown systems.
Vlachodimitropoulos
H
H
University of Melbourne, School of Dental Science, Australia.
Wilson
P R
PR
D002484:Cementation; D002516:Ceramics / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003442:Crowns; D003738:Dental Cements / Q000737:chemistry*; D004548:Elasticity; D005899:Glass Ionomer Cements / Q000737:chemistry; D008277:Magnesium Oxide / Q000737:chemistry; D008422:Materials Testing; D011076:Polycarboxylate Cement / Q000737:chemistry; D012212:Rheology; D013997:Time Factors; D015034:Zinc Oxide / Q000737:chemistry; D015036:Zinc Phosphate Cement / Q000737:chemistry
D003738:Dental Cements; D005899:Glass Ionomer Cements; D011076:Polycarboxylate Cement; C031374:zinc polyacrylate; D008277:Magnesium Oxide; D015036:Zinc Phosphate Cement; C040235:Ketac-cem; C086629:Phosphacap; D015034:Zinc Oxide