Related Experiment Video
Updated: Mar 22, 2026
Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
The effect of temperature on rheological properties of endodontic sealers
Roshni U Rai1, Kiran P Singbal1, Vaishali Parekh1
1Department of Conservative Dentistry and Endodontics, KM Shah Dental College and Hospital, Vadodara, Gujarat, India.
Aim:
The purpose of this study was to investigate temperature-dependent rheological properties of three endodontic sealers MTA Fillapex (Angelus, Brazil), AH Plus (Dentsply, Germany), and EndoREZ (Ultradent, USA).
Materials And Methods:
Five samples of each group of endodontic sealers (n = 30) were freshly mixed and placed on the plate of a rheometer (MCR 301, AntonPaar, Physica) and examined at 25°C and 37°C temperature, respectively. Rheological properties of the sealers were calculated according to the loss modulus (G″), storage modulus (G'), loss factor (Tan δ), and complex viscosity (η*) using dynamic oscillatory shear tests.
Results:
Statistical analysis (Wilcoxon signed-rank test) demonstrated that MTA Fillapex exhibited higher loss modulus (G″ > G') and a crossover region. AH Plus and EndoREZ had a higher storage modulus (G' > G″) at both temperatures. Loss factor (Tan δ) of MTA Fillapex was the highest compared to AH Plus, followed by EndoREZ. With a temperature change from 25°C to 37°C, MTA Fillapex exhibited a decrease while AH Plus exhibited an increase and, EndoREZ exhibited the least change, in complex viscosity (η*).
Conclusions:
EndoREZ exhibited better rheological properties compared to the other two test sealers.
