| Project/Area Number |
15K11145
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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 | Tohoku University |
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Principal Investigator |
Kasahara Shin 東北大学, 歯学研究科, 臨床教授 (70169407)
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| Co-Investigator(Kenkyū-buntansha) |
江草 宏 東北大学, 歯学研究科, 教授 (30379078)
三浦 賞子 東北大学, 歯学研究科, 助教 (60431590)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | ジルコニア / CAD/CAM / リスク因子 / 臨床研究 / 三次元有限要素法 / 陶材 / 辺縁形態 / フルジルコニア / 前向き臨床研究 / リスクファクター / 延長ブリッジ / 3次元有限要素法 / 破折 |
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| Outline of Final Research Achievements |
This study evaluated the influence of different finish line designs and abutment materials of bilayer and monolithic zirconia crowns using three-dimensional finite element analysis. Three-dimensional models of two types of premolar crowns, an yttria-stabilized zirconia framework with veneering ceramic and a monolithic zirconia ceramic, were used in the analysis. Cylindrical models with the finish line design of the crown abutments were prepared with three types of margin curvature radius; R0: shoulder margin, R0.5: rounded shoulder margin and R1.0: deep chamfer margin. Two abutment materials, dentin and brass, were analyzed. In the FEA model, 1 N was loaded perpendicular to the occlusal surface at the center of the crown. For all crowns, stress was localized to the occlusal loading area as well as to axial walls of the proximal region. The lowest maximum principal stress values were observed when the dentin abutment with R0.5 was used under a monolithic zirconia crown.
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