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2022 Fiscal Year Final Research Report

A Fundamental Study on Adhesive Systems for Establishing Treatment Methods for Radiation-Induced Dental Caries

Research Project

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Project/Area Number 19K10149
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 InstitutionOkayama University

Principal Investigator

Matsuzaki Kumiko (田中久美子)  岡山大学, 医歯薬学域, 助教 (50550802)

Co-Investigator(Kenkyū-buntansha) 吉山 昌宏  岡山大学, 医歯薬学域, 教授 (10201071)
島田 康史  東京医科歯科大学, 大学院医歯学総合研究科, 教授 (60282761)
松崎 秀信  岡山大学, 大学病院, 助教 (70325124)
Project Period (FY) 2019-04-01 – 2023-03-31
Keywords放射線性う蝕 / 象牙質脱灰抑制 / 象牙質知覚過敏抑制材
Outline of Final Research Achievements

We conducted research on dentin adhesion surfaces. This was a fundamental study aimed at establishing treatment methods for radiation-induced dental caries.Some dentin desensitizers have the ability to block the openings of dentinal tubules. Applying this mechanism, we investigated the effect of inhibiting demineralization on dentin adhesion surfaces.As a result, it was shown that dentin desensitizers can inhibit demineralization at the very surface or slightly deeper layers of the dentin adhesion surface.
We also conducted a similar investigation using extracted human teeth irradiated with radiation. As a result, the irradiated specimens were found to be more susceptible to demineralization in acidic conditions. Furthermore, these dentin desensitizers showed potential in inhibiting the dentin demineralization.

Free Research Field

保存治療学

Academic Significance and Societal Importance of the Research Achievements

頭頸部癌に対する放射線治療の晩期障害のひとつに、放射線う蝕が挙げられる。放射線う蝕は一度発症すると急速かつ多発的に進行する。本研究の成果は、放射線性う蝕の進行抑制につながる可能性、あるいは、直接修復処置を行う際の被着面を強化する可能性を示唆するものであった。本研究は、市販の象牙質知覚過敏抑制材を応用したものであるため、コストや生体安全性から考えて、実用可能と考えられる。検証の方法が象牙質表面の性状の観察にとどまっているため、機械的性質の検証などさらなる研究を行う必要があるが、放射線治療を受けた頭頸部がん患者の、治療後の食生活の質を低下させないための一助となる可能性が示された。

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Published: 2024-01-30  

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