2023 Fiscal Year Final Research Report
rown anStudy on clinical application of last molar and bridge with PEEK material
| Project/Area Number |
21K10021
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 57050:Prosthodontics-related
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
西尾 文子 鹿児島大学, 医歯学域歯学系, 助教 (00881294)
森田 晃司 広島大学, 病院(歯), 助教 (30555149)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | PEEK / 研磨 / 臨床応用 / 大臼歯 / スーパーエンジニアリングプラスチック / CAD/CAM |
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| Outline of Final Research Achievements |
Clinical studies using polyetheretherketone (PEEK) on molars have raised concerns about wear resistance, polishability, and other issues, so material studies and new clinical studies were conducted on the application of PEEK crowns on last molars, which are subject to heavy loading.
Regarding polishing, the most smooth PEEK surfaces with complex shapes were obtained by polishing with Carborundum Fine, S-Lime, and MultiBlue, in that order. No fracture or detachment occurred in 12 cases of 6-month observation of the application of PEEK crowns on the last molar. In a clinical study of performed molar PEEK crowns, 21 cases, 2 years of continuous observation, occlusal contact and masticatory ability were maintained, although wear and occlusal wear progressed in some cases.
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| Free Research Field |
補綴理工系歯学関連
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| Academic Significance and Societal Importance of the Research Achievements |
非金属性新規歯冠補綴材料のポリエーテルエーテルケトン（PEEK）の臨床応用を目指す研究は学術的にも社会的にも有意義である。研磨の推奨できる方法を示し、大臼歯PEEKクラウンの摩耗が進行した場合でも、咬合接触と咀嚼能力は維持されていた。過剰な負荷がかかる最後臼歯部大臼歯クラウンについても破折や脱離生じないことを確かめた。これらの成果もあり、2023年12月に大臼歯PEEKクラウンとして健康保険に適用された。PEEKが導入されるのは初めてで、患者は大きな費用負担なしに、歯科用貴金属価格の高騰や金属アレルギー対策などの利益が期待できるメタルフリーの治療を受けられるようになったことは意義が高い。
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