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2022 Fiscal Year Final Research Report

Development of a novel artificial tooth and bone material consist of cellulose nanocrystal and hydroxyapatite.

Research Project

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Project/Area Number 21K19132
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 40:Forestry and forest products science, applied aquatic science, and related fields
Research InstitutionTohoku University

Principal Investigator

Arita Toshihiko  東北大学, 多元物質科学研究所, 助教 (50423033)

Co-Investigator(Kenkyū-buntansha) 増原 陽人  山形大学, 大学院理工学研究科, 教授 (30375167)
Project Period (FY) 2021-07-09 – 2023-03-31
Keywordsセルロースナノクリスタル / 歯科修復材料 / ハイドロキシパタタイト
Outline of Final Research Achievements

After preparing P-CNC with phosphate groups on the CNC surface, we successfully coated HAp onto the P-CNC surface (P-CNC@HAp). Compared to unmodified CNCs, P-CNCs exhibited stronger binding to HAp through hydrogen bonds and ionic bonds. This suppression of defects at the P-CNC-HAp interface led to an improvement in compressive strength.And to prevent the hydrophilic P-CNC@HAp from leaching into the biologocal object, P-CNC@HAp/CS was successfully prepared by complexing P-CNC@HAp with dissolved CS. Moreover, in a remineralization test using artificial saliva, SEM-EDX analysis revealed the formation of new HAp crystals on the surface of P-CNC@HAp/CS. These results suggested that the P-CNC@HAp/CS exhibits remineralization ability.

Free Research Field

高分子化学

Academic Significance and Societal Importance of the Research Achievements

現在、歯科修復材料分野では、その主流材料として、金属材料、セラミックス、コンポジットレジンに関する研究が多数報告されているが、未だ操作性や生体適合性 (経年的変化への追従や強度)、高い安全性を全て満たした理想的な材料は無い。本研究の達成は、一段階の施術のみで、従来の接着を超えた、歯と融合する新規歯科修復材料が開発でき、歯科治療分野における革新的な進歩をもたらす。本材料は歯科修復材料だけでなく、骨の治癒にも応用可能な点や、CNCとCSは自然界に豊富に存在する持続可能な資源であり、歯科材料を含む硬組織修復材料の新しいプロトタイプとなることが期待される。

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Published: 2024-01-30  

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