Related Experiment Video
Updated: Feb 18, 2026
09:06
Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
7.8K
A comparative evaluation of bracket bonding with 1-, 2-, and 3-component adhesive systems
Andreas Faltermeier1, Michael Behr, Dieter Müssig
1Department of Orthodontics, University Medical Center of Regensburg, Regensburg, Germany. Andreas.Faltermeier@klinik.uni-regensburg.de
Summary
One-component adhesives showed decreased shear bond strength compared to two- and three-component systems. However, with improvements, one-component adhesives can effectively compete in bracket bonding applications.
Area of Science:
- Orthodontic materials science
- Dental biomaterials
Background:
- Modern dental adhesives offer 1- and 2-component options to reduce contamination and chair-time during bracket bonding.
- This study evaluates the performance of different adhesive component systems.
Purpose of the Study:
- To compare the shear bond strength (SBS) and adhesive remnant index (ARI) of 1-, 2-, and 3-component orthodontic adhesives.
- To assess the impact of thermocycling on adhesive performance.
Main Methods:
- Fifty stainless steel brackets were bonded to extracted molars using five adhesive systems (two 1-component, two 2-component, one 3-component control).
- Samples underwent 6000 cycles of thermocycling (5°C/55°C) within a mastication device.
- Shear bond strength testing and ARI scoring were performed post-thermocycling.
Main Results:
- No significant difference in SBS was found between 2- and 3-component adhesive systems.
- A significant decrease in SBS was observed for both 1-component adhesives (RelyX Unicem, Maxcem) compared to 2- and 3-component systems.
- Adhesive remnant index scores showed no significant differences across all tested groups.
Conclusions:
- One-component adhesives demonstrated reduced shear bond strength after thermocycling compared to multi-component systems.
- Further enhancements in one-component adhesive technology could enable them to successfully compete with traditional 2- and 3-component systems in orthodontics.
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