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Updated: Jun 1, 2026

Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
Influence of 2-hydroxyethyl methacrylate concentration on polymer network of adhesive resin
Fabrício Mezzomo Collares1, Fabrício Aulo Ogliari, César Henrique Zanchi
1Conservative Dentistry Department, School of Dentistry, Federal University of Rio Grande do Sul, RS, Brazil. fabriciodonto@gmail.com
Purpose:
To evaluate the effect of variations in 2-hydroxyethyl methacrylate (HEMA) concentrations in an experimental comonomer blend on degree of conversion, water sorption, solubility, and ultimate tensile strength of adhesive resin.
Materials And Methods:
The effect of HEMA content (0, 15, 30, and 50%wt - control, G15, G30, and G50 groups, respectively) was tested in an experimental comonomer blend of bis-GMA, bis-EMA, TEG-DMA, and HEMA. The degree of conversion, polymerization rate, ultimate tensile strength, water sorption, and solubility of the adhesive resin blends were determined.
Results:
At 40 s of light activation time, groups G30 and G50 showed a decrease of 30% and 61%, respectively, in degree of conversion compared to control. Water sorption and solubility differed for all groups, and was statistically higher in G50. For ultimate tensile strength, the control and G15 groups showed statistically higher values than the other groups (p < 0.05).
Conclusion:
Higher HEMA content increases dental adhesive resin degradation.
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