2021 Fiscal Year Final Research Report

A Study on Surface Modification of Litium Disilicate Glass Ceramic

Research Project

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Project/Area Number	18K09670
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Review Section	Basic Section 57050:Prosthodontics-related
Research Institution	Kanagawa Dental College
Principal Investigator	Hamano Naho 神奈川歯科大学, 歯学部, 准教授 (30386833)
Co-Investigator(Kenkyū-buntansha)	井野智神奈川歯科大学, 歯学部, 教授 (80257295) 福山卓志神奈川歯科大学, 歯学部, 助教 (10815682) 岩下英夫神奈川歯科大学, 歯学部, 助教 (60650851)
Project Period (FY)	2018-04-01 – 2022-03-31
Keywords	ニケイ酸リチウムガラス / CAD/CAM用ハイブリッドレジン / レジンコーティング法 / 接着強さ / 接着耐久性 / 表面処理
Outline of Final Research Achievements	The demand for aesthetic prostheses is increasing, and lithium disilicate ceramics are widely used in clinical settings. The prosthesis needs to firmly adhere to the abutment for the long-term stability of an all-ceramic restoration. The treatment of the inner surface of the prosthesis, which comes in contact with the abutment, considerably affects the long-term stability of the restoration. In this study, the effects of various surface treatments, including resin coating, were evaluated on the bond strength between lithium disilicate ceramics and luting agent. The combination of multipurpose ceramic/metal primers and resin coating can significantly increase the bond strength between lithium disilicate ceramics and luting agent.
Free Research Field	医歯薬学　歯科補綴
Academic Significance and Societal Importance of the Research Achievements	近年、臨床の場における患者の審美的要求は高まっており、且つ、MIの観点から、歯冠修復・補綴装置の厚さはより一層薄くなる傾向にある。それらに対応すべく歯科治療に応用されているニケイ酸リチウムガラスに対して、適切な表面処理法を見いだし、その耐久性が証明されれば、審美歯科治療の発展に大きく貢献できる。更には、シラン処理の効果が低いとされる高強度セラミックスに対する接着への応用も期待できる可能性がある。