2023 Fiscal Year Annual Research Report
Fabrication of bioactive zirconia implant
| Project/Area Number |
19K10250
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| Research Institution | Nagasaki University |
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Principal Investigator |
バラネザハド 有礼左 長崎大学, 医歯薬学総合研究科(歯学系), 助教 (00608870)
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| Co-Investigator(Kenkyū-buntansha) |
渡邊 郁哉 長崎大学, 医歯薬学総合研究科(歯学系), 教授 (00274671)
尾立 哲郎 長崎大学, 病院(歯学系), 講師 (70513167)
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Keywords | implant / zirconia / bioactivity |
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| Outline of Annual Research Achievements |
Ceramic 45S5 BG (45%SiO2, 24.5%Na2O, 24.5%CaO, and 6%P2O5 by weight) have gained researchers attention as a functional biomaterial due to its bioactive surface and osseointegration ability. It has been approved that BG 45S5 can heal and repair bone damages. Therefore, The sol-gel technique preparation protocol followed to prepare 45S5 BG, by mixing the tetraethylorthosilicate (TEOS, Wako, Tokyo, Japan), nitric acid, triethylphosphate (TEP, Wako, Japan), calcium nitrate tetrahydrate (Wako), sodium nitrate (Wako). The zirconia substrates coated by one-time vacuum sol-dipping method under 0.1 bar pressure dipped for 60 s and dried at 60°C for 1 hour followed by sintering at 1200°C for 1 hour to melt the BG on the surface in a programmable furnace with a heating rate of 10°C/min. The characterizations such as morphology, adhesion test and roughness investigated after BG coating. The SEM images confirmed that 900°C is not enough to melt and cover entire surface therefore 1200°C was applied. Also the Fractography result showed that the thickness of the coating layer is controllable between 5 um to 45 um. The XRD result mentioned the non-crystallin and crystalline BG phase structures.
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