2017 Fiscal Year Final Research Report
Improvement of low temperature degradation in zirconia and bond strength of resin cement to zirconia by alumina-blasting before sintering
| Project/Area Number |
15K11165
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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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| Research Field |
Prosthodontics/ Dental materials science and
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| Research Institution | Nagasaki University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
平 曜輔 長崎大学, 医歯薬学総合研究科(歯学系), 准教授 (40226725)
鎌田 幸治 長崎大学, 病院(歯学系), 講師 (60264256)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | ジルコニア / アルミナブラスティング / 焼結 / 表面性状 / 接着強さ / ガラスビーズ |
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| Outline of Final Research Achievements |
Plate zirconia specimens were prepared and divided into five surface conditions: PS; pre-sintered state without surface treatment, S; sintering, S+AAB; AB (0.3 MPa for 15 s) using 50 μm alumina particles after sintering, BAB; AB (0.1 MPa for 5 s) in the PS, and BAB+S; BAB subsequent sintering.
Ra obtained from the BAB+S specimens were significantly higher values (2.26 ± 0.19 μm) than those of the other four surface conditions. The relative amount of the monoclinic phase on the BAB specimens was 15.7 ± 1.9%. However, after sintering, the monoclinic peaks decreased dramatically zero, which was the same as for the S specimens. On the other hand, the S+AAB specimens showed significantly remarkable monoclinic phase of 28.6 ± 0.5%.
AB performed in the pre-sintered state subsequent sintering (BAB+S) resulted in higher surface roughness and less surface damage, compared with AB after sintering (S+AAB), which is a clinically routine procedure before cementation of zirconia restorations.
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| Free Research Field |
歯科補綴学
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