The electrical properties and glass transition of some dental materials after temperature exposure

• Published in: Journal of materials science. Materials in medicine Vol. 28; no. 12; pp. 186 - 11
• Main Authors: Marcinkowska, Agnieszka, Gauza-Wlodarczyk, Marlena, Kubisz, Leszek, Hedzelek, Wieslaw
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.12.2017; Springer Nature B.V
• Subjects: Biomaterials; Biomedical Engineering and Bioengineering; Biomedical materials; Ceramics; Chemistry and Materials Science; Clinical Applications of Biomaterials; Composite materials; Composites; Deformation; Deformation mechanisms; Dental materials; Dental restorative materials; Dental sealants; Electrical properties; Electrical resistivity; Exposure; Glass; Glass transition temperature; Graphs; Heating; Insulators; Materials Science; Natural Materials; Oral cavity; Physicochemical properties; Polymer matrix composites; Polymer Sciences; Prostheses; Regenerative Medicine/Tissue Engineering; Sealants; Surfaces and Interfaces; Temperature; Temperature effects; Thin Films; Transition temperatures
• ISSN: 0957-4530; 1573-4838
• DOI: 10.1007/s10856-017-5996-2

The physicochemical properties of dental materials will remain stable only when these materials in question are resistant to the changes in the oral cavity. The oral environment is subject to large temperature variations. The aim of the study was the assessment of electrical properties and glass transition of some dental materials after temperature exposure. Composite materials, compomers, materials for temporary prosthetic replacement and resin-based pit and fissure sealants were used in the study. The method used was electric conductivity of materials under changing temperature. The order of materials presenting the best characteristics for insulators was as follows: materials for temporary prosthetic replacement, resin-based pit and fissure sealants, composites, and compomers. Thanks to comparisons made between graphs during I and II heating run, the method could be used to observe changes in the heated material and determine whether the changes observed are reversible or permanent. The graphs also provided temperature values which contain information on glass transition during heating. In the oral cavity the effect of the constant temperature stimulus influences maturity of dental materials and improves their properties. But high temperatures over glass transition temperature can cause irreversible deformation and changes of the materials properties, even in a short time. Graphical abstract