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2023 Fiscal Year Final Research Report

Establishment of a new surface treatment for adhesive resins using dental lasers and its application to coronal restoration

Research Project

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Project/Area Number 21K09880
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57030:Conservative dentistry-related
Research InstitutionThe Nippon Dental University

Principal Investigator

Suzuki Masaya  日本歯科大学, 新潟生命歯学部, 准教授 (10409237)

Project Period (FY) 2021-04-01 – 2024-03-31
KeywordsCAD/CAMブロック / 歯科用レーザー / 被着面処理 / 接着強さ
Outline of Final Research Achievements

This study investigated the use of dental laser irradiation as a surface treatment for improving the bond strength of adhesive resins. Er:YAG laser irradiation followed by sandblasting significantly increased the bond strength of CAD/CAM resin blocks to resin cement. However, this effect diminished after thermal cycle testing. Alternatively, silane coupling treatment activated by semiconductor laser irradiation at an output power of approximately 7 W resulted in a statistically significant increase in bond strength that remained even after thermal cycling. This group displayed significantly higher adhesive strength compared to the control group.

Free Research Field

歯科保存学

Academic Significance and Societal Importance of the Research Achievements

Repeated Restoration Cycle(同じ歯を何度も治療することで抜歯に至る)を遅らせるためには、修復部物の長寿命化を図ることで生涯の治療回数を減少させることが有効である。現代の歯冠修復治療に接着技術は不可欠であるが、口腔内ストレスの影響、接着界面の経時的劣化、新規修復材料への接着技法など、臨床課題は多い。本研究では、特に2010年代より保険導入を開始したCAD/CAM材料の接着強さの向上を目的として、その被着面処理法を評価した。金属価格の高騰と歯科技工士不足により、CAD/CAMによる修復は今後も拡大すると予想されるため、本研究の成果は広く国民の健康に寄与すると考えている。

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Published: 2025-01-30  

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