Molecular control of functional monomers in zirconia-tooth adhesive interface

2014 Fiscal Year Final Research Report

• Project/Area Number: 24592914
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Prosthetic dentistry
• Research Institution: Okayama University
• Principal Investigator: NAGAOKA NORIYUKI 岡山大学, 医歯(薬)学総合研究科, 助教 (70304326)
• Co-Investigator(Kenkyū-buntansha): MATSUMOTO Takuya 岡山大学, 大学院医歯薬学総合研究科, 教授 (40324793) ; IRIE Masao 岡山大学, 大学院医歯薬学総合研究科, 助教 (90105594)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ジルコニア / 接着歯学 / 界面 / 機能性モノマー / リン酸モノマー / 分析 / 電子顕微鏡

Outline of Final Research Achievements

We analyzed the chemical interaction of the phosphoric-acid ester monomer 10-methacryloyloxydecyldihydrogenphosphate (10-MDP) with zirconia using 1H and 31P MAS NMR and 1H→31P Heteronuclear Correlation (HETCOR) NMR, and determined the shear bond strength of composite cement to 10-MDP-treated zirconia. The shear bond strengt was significantly higher to 1ppb 10-MDP-treated zirconia than to untreated zirconia. The shear bond strengt increased with the concentration of 10-MDP. NMR revealed a 31P chemical shift of 10-MDP upon interaction with zirconia. 10-MDP improved SBS to zirconia in a concentration-dependent manner. NMR detected the presence of 10-MDP onto zirconia, even after being washed with acetone; 10-MDP chemically interacted with zirconia.

Free Research Field

歯科理工・補綴学