The role of functional phosphoric acid ester monomers in the surface treatment of yttria-stabilized tetragonal zirconia polycrystals

• Published in: Dental Materials Journal Vol. 36; no. 2; pp. 190 - 194
• Main Authors: ARAI, Masami, TAKAGAKI, Tomohiro, TAKAHASHI, Akifumi, TAGAMI, Junji
• Format: Journal Article
• Language: English; Japanese
• Published: Japan The Japanese Society for Dental Materials and Devices 2017; Japanese Society for Dental Materials and Devices; Japan Science and Technology Agency
• Subjects: Adhesion; Air drying; Bond strength; Bonding strength; Cement; Ceramic bonding; Contact angle; Dental Bonding; Dental Stress Analysis; Dentistry; Drying; Ethanol; Materials Testing; Monomers; Organophosphates; Phosphoric acid; Phosphoric functional monomer; Polycrystals; Primers; Resin Cements; Shear Strength; Surface Properties; Surface treatment; Tensile bond strength; Tetragonal zirconia; Tetragonal zirconia polycrystals; Ultrasonic testing; Yttria-stabilized tetragonal zirconia; Yttria-stabilized zirconia; Yttrium; Yttrium oxide; Zirconia; Zirconium; Zirconium dioxide
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2016-060

This study aimed to evaluate the bond strength of a resin cement to yttria-stabilized tetragonal zirconia polycrystals (Y-TZPs) treated with three different phosphate functional monomers containing primers by measuring the water contact angle. Seventy Y-TZP discs were divided into seven experimental groups (n=10), including an untreated (control) group. Specimens were treated with one of the following monomers: MDP (MD), GPDM (GP), and Phenyl-P (PP). After primer application and air drying, half the treated specimens were ultrasonically cleaned in ethanol for 2 min (MD-e, GP-e, and PP-e), and contact angles were measured. The tensile bond strength test was performed after storage for 24 h in 37°C water. The contact angle on the MD-e surface (64°) was significantly higher than that on the Con, GP-e, and PP-e surfaces (51°–52°). The application of the MDP-containing primer resulted in significantly higher bond strength between Y-TZP ceramics and a resin cement.