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Characterization of the development of elasticity in dental luting cements
H Vlachodimitropoulos1, P R Wilson
1University of Melbourne, School of Dental Science, Australia.
Objectives:
The development of elasticity of dental luting cements was investigated as an indicator of working and setting time.
Method:
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.
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