Strengthening of biomedical titanium alloy for narrow implants application

2020 Fiscal Year Final Research Report

• Project/Area Number: 15K20473
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Dental engineering/Regenerative dentistry
• Research Institution: Tokyo Medical and Dental University
• Principal Investigator: Ashida Maki 東京医科歯科大学, 生体材料工学研究所, 助教 (50708386)
• Project Period (FY): 2015-04-01 – 2021-03-31
• Keywords: チタン合金 / 巨大ひずみ加工 / 金属生体材料

Outline of Final Research Achievements

A Ti-6Al-7Nb alloy with three different initial microstructures was processed by high-pressure torsion (HPT) and the resultant microstructure and mechanical properties of the alloy after HPT processing were investigated. The Ti-6Al-7Nb alloy with the bi-modal microstructure was strengthened more than with the equiaxed microstructure when the alloy was processed by HPT. Furthermore, the alloy with bi-modal microstructure consisting of equiaxed α-phase and acicular α’-phase showed a good balance between the tensile strength and the elongation to fracture after 1 revolution. In summary, large strength and elongation of the Ti-6Al-7Nb alloy were simultaneously achieved by HPT processing.

Free Research Field

金属生体材料学

Academic Significance and Societal Importance of the Research Achievements

高強度チタン合金の、従来の歯科インプラントより直径の小さいナローインプラントへの応用ができれば、適用可能となる症例が増加する。これによって大がかりな骨造成手術の必要がなくなり、手術の回数、治療期間の短縮などの観点から歯科インプラント治療患者への負担を低減することができる。またナローインプラントのみではなくインプラント小型化促進につながる。