In Vitro Analysis of AHPlus and MM-Seal by ESR and Thermoanalytical Methods
Y. Ceylana, A. Ustab, K. Ustab, F. Kont Cobankarac, C. Yildirimd and M. Bireye
aSelcuk University, Faculty of Science, Department of Physics, Konya, Turkey
bAlanya Alaaddin Keykubat University, Alanya Engineering Faculty, Alanya, Antalya, Turkey
cDepartment of Endodontics, Faculty of Dentistry, University of Selcuk, Konya, Turkey
dDepartment of Endodontics, Faculty of Dentistry, University of Gaziantep, Gaziantep, Turkey
eDepartment of Physics, Faculty of Science University of Ankara, Ankara, Turkey
Full Text PDF
The free radicals and their concentration in resin materials may impact biocompatibility and polymerization properties of dental materials. The aim of this study was to determine whether there are free radicals and to obtain useful information about thermal stability of materials using electron spin resonance (ESR) spectroscopy, TGA (Thermogravimetry Analysis) and DTA (Differential Thermal Analysis) methods. Epoxy resin-based sealers AHPlus and MM-Seal samples, freshly mixed and set, were prepared to be analysed with ESR and thermal methods. The free radicals were found in dental materials. As radical concentration in AHPlus have changed very slowly, the concentration in MM-Seal have decreased dramatically. Also, MM-Seal was found to decompose in three steps with the increasing temperature, while decomposition of the AHPlus occurred in two steps.

DOI: 10.12693/APhysPolA.128.B-479
PACS numbers: 87.66.Uv, 36.20.Kd, 39.30.+w, 33.35.+r