Electrical shear bonding strength reduction of resin-modified glass-ionomer-cement containing ionic-liquid : Concept and validation of a smart dental cement debonding-on-demand

With improvement of bonding strength of recent dental cement, it is difficult nowadays to remove restorations without excessive force or vibration to tooth, occasionally resulting in damage of dentin, enamel, and dental root. Therefore, “smart” dental cement indicating strong bonding and easy debonding-on-demand simultaneously is required. In this research, resin-modified glass-ionomer-cement containing an ionic-liquid, tris(2-hydroxyethyl)methylammonium methylsulfate was produced, and the shear bonding strength before and after direct current application were evaluated. The prototype cement containing 15 to 20 mass% ionic-liquid indicated simultaneously no significant reduction of shear bonding strength from that of the original cement not containing ionic-liquid, and significant reduction of bonding strength to approximately 20% of that of the original cement after direct current application of more than 2 mmC/mm2. The prototype cement in this research demonstrated that the concept of smart dental cement electrically debonding-on-demand is feasible.

内容要旨・審査要旨・論文本文の公開
本論文は, 著者Noboru KAJIMOTOの学位論文として提出され, 学位審査・授与の対象となっている。

© 2018 The Japanese Society for Dental Materials and Devices