2022 Fiscal Year Final Research Report
Novel abutment post-core construction using single-structure FRC
| Project/Area Number |
17K17155
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Prosthodontics/ Dental materials science and
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| Research Institution | Tokyo Medical and Dental University |
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Principal Investigator |
Nagata Kohji 東京医科歯科大学, 歯学部, 非常勤講師 (00793043)
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| Project Period (FY) |
2017-04-01 – 2023-03-31
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| Keywords | ガラス繊維補強型コンポジットレジン / 支台築造 / 有限要素解析 / 単一構造FRC |
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| Outline of Final Research Achievements |
The applications of single-structure fiber-reinforced composite (FRC) in restorative dentistry have not been well reported. The purpose of this study was to investigate single-structured FRC post-core constructions that minimize the risk of root fracture and have excellent fracture resistance of the post-core itself.
We constructed three-dimensional finite element abutment tooth models with some types of post-core constructions. By changing various post-core designs and surrounding alveolar bone levels, stress distribution changes in fiber posts and roots were compared and examined.
Post-core constructions using a single-structured FRC may contribute to more effective prosthetic treatment by combining planning and design with finite element analysis.
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| Free Research Field |
補綴歯科学
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| Academic Significance and Societal Importance of the Research Achievements |
歯根破折は抜歯診断に至る主な原因の一つであり, 根管治療後の支台築造は，歯根破折に最も影響する治療過程である．単一構造FRCを用いた歯台築造方法により，従来よりも機械的強度が不足を補い，限られていた適応症の拡大が望まれる．これにより，これまで保存が困難で抜歯が余儀なくされた支台歯，特に残存歯質が少なく，さらに骨吸収が進んだ弱体化した支台歯においても，有限要素法を用いた解析を併用して補綴設計を行うことで，歯根破折のリスクを最小限とし，補綴治療の長期予後に貢献できる可能性がある．
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