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

• Published in: Dental Materials Journal Vol. 37; no. 5; pp. 768 - 774
• Main Authors: KAJIMOTO, Noboru, UYAMA, Emi, SEKINE, Kazumitsu, HAMADA, Kenichi
• Format: Journal Article
• Language: English
• Published: Japan The Japanese Society for Dental Materials and Devices 27.09.2018; Japan Science and Technology Agency
• Subjects: Bonding strength; Cement; Composite Resins; Debonding; Demand; Dental cement; Dental Debonding - methods; Dental enamel; Dental restorative materials; Dental roots; Dentin; Dentistry; Direct current; Electricity; Glass; Glass ionomer cement; Glass Ionomer Cements - chemistry; Heat treating; Ionic liquids; Ionic Liquids - chemistry; Ionic-liquid; Ionomers; Joint ventures; Materials Testing; Methylamines - chemistry; Prototypes; Reduction; Resin Cements - chemistry; Resins; Shear; Shear bonding strength; Shear Strength; Smart adhesive; Sulfuric Acid Esters - chemistry; Surface Properties; Teeth; Vibration; Smart adhesive; Ionic-liquid; Shear bonding strength; Glass ionomer cement
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2017-361

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.