Related Experiment Video
Updated: Apr 21, 2026

Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
The effects of light curing units and environmental temperatures on C = C conversion of commercial and experimental
Tahereh Sadat Jafarzadeh-Kashi1, Mohmmad Erfan2, Salmeh Kalbasi3
1Iranian Tissue Bank & Research Center, Tehran University of Medical Sciences, Tehran, Iran ; Department of Dental Materials, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran ; Research Center for Medical and Technology in Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran.
Background And Purpose:
Polymerization of bonding agents (BA) is a critical factor in determining the success of bonded restorations. We aimed to assess the effects of two light curing units and two temperatures on the extent of polymerization (EP) of a commercial BA and an experimental BA.
Methods:
Forty BA specimens were randomly divided into 8 subgroups of n = 5 to compare the polymerization of two BAs (experimental/Scotchbond) based on the variables: temperature (23/37 °C) and light-curing unit (quartz-tungsten-halogen/light-emitting diode). The EP (%) was measured using differential scanning calorimetry, and analyzed using the t-test, two- and three-way analyses of variance (ANOVA), and the Bonferroni test (α = 0.05).
Results:
There were significant differences between the EP results between the two BAs (P = 0.012) and due to the different temperatures (P = 0.001), but not between the different light-curing units (P = 0.548). The interaction between BA and temperature was significant (P < 0.001). The other interactions were nonsignificant.
Conclusions:
The two light-curing units had similar effects on the EP. The EP values were better when curing was performed at human body temperature.
More Related Videos
Related Concept Videos
Curing Methods
Accelerated Curing of Concrete
Curing of Concrete
Bonding and Strength of Aggregate
Drying Shrinkage
A portion of this drying shrinkage can be reversed; if the concrete is...
Variables Affecting Phosphorescence and Fluorescence

