Development of bio-friendly polyetheretherketone (PEEK) composite restoration

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K10002
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 57050:Prosthodontics-related
• Research Institution: Hiroshima University
• Principal Investigator: Shimoe Saiji 広島大学, 医系科学研究科(歯), 准教授 (90379884)
• Co-Investigator(Kenkyū-buntansha): 加来 真人 広島大学, 医系科学研究科(歯), 教授 (10325194) ; 平田 伊佐雄 広島大学, 医系科学研究科(歯), 助教 (40346507)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: PEEK / 接着 / 歯冠用レジン / 義歯床用アクリルレジン / 機械的維持 / 化学的処理

Outline of Final Research Achievements

PEEK is currently used alone for crowns, but by combining it with polymeric materials, it can be used in a variety of cases. This requires strong adhesion between the two materials.
When combining PEEK and polymer materials, it has been revealed that a primer containing MMA, which photopolymerizes and forms a layer, is effective in chemical treatment. In addition, for mechanical maintenance, considering the possibility of damage to the PEEK material with alumina blasting, which is the simplest method to use, it was thought that the most effective mechanical maintenance would be an air pressure of around 0.3 MPa and a particle size of around 50 μm.　Furthermore, for mechanical maintenance other than alumina blasting, it was suggested that grid-like maintenance using a laser is even more effective.

Free Research Field

補綴系歯学関連

Academic Significance and Societal Importance of the Research Achievements

PEEKは生体親和性に優れ、強度も金属に近い値を有しており、新しい生体材料として注目されているが、材料的に他の材料との接着が難しい。この研究では化学的処理と機械的維持それぞれについて、最も効果的な条件を明らかにし、臨床的に応用可能な値を導き出した。
これらの成果により、できるだけ金属を使用しないことが望まれる歯科治療において、PEEK材を単体で臨床に用いるだけでなく、高分子材料と複合化した補綴物を使用することが可能であると考えられ、歯科治療において金属を使わない新たな選択肢ができたと思われる。