| Project/Area Number |
16H06644
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Prosthodontics/ Dental materials science and
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2016-08-26 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
|
| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | CAD/CAM冠 / コンポジットレジン / 接着 / レジンセメント / 歯学 |
|---|
| Outline of Final Research Achievements |
To measure degree of conversion of composite resin cement, Vickers hardness test was performed up to 7days. G-cem One cement reached a plateau at 4-7 days. The degree of conversion of 30-second irradiation time group was significantly higher than 10-second group. CAD/CAM generated composite resin crown pull off test was performed and all of 10-sec group showed adhesive failure whereas some of 30-sec group showed cohesive failure in resin cement. Crown fracture test was performed and the influence of CAD/CAM composite resin block grade, cement thickness and presence or absence of adhesive enhancing primer was assessed. Observing fracture surface, cement layer was separated by the abutment in 200µm cement thickness and primer (-) group whereas crown fracture load was not significantly different.
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