| Project/Area Number |
19390502
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
補綴理工系歯学
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| Research Institution | Tsurumi University |
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Principal Investigator |
FUKUSHIMA Shunji Tsurumi University, 歯学部, 教授 (60014205)
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| Co-Investigator(Kenkyū-buntansha) |
OGAWA Takumi 鶴見大学, 歯学部, 助教 (20267537)
SHIGETA Yuko 鶴見大学, 歯学部, 助教 (40367298)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
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| Keywords | 冠橋義歯学 / 4次元下顎運動 / 3次元造形 / 顎機能 / CAD / CAM / 補綴装置 / 全部鋳造冠 / 機能咬合面 / 3次元再構築像 / 冠・橋義歯学 |
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| Research Abstract |
The purpose of this present study was to provide a virtual articulator, and to design a functional occlusal surface via a virtual articulator in VR space, with added insight provided by a haptic device.
Our CAD/CAM system procedures composed of the 4 following steps : Step 1 : A virtual dentition model (VDM) was reconstructed through laser surface scanning data of dental casts, scanned with a 3D scanner via 3D mesh modeling software. Step2 : Scanned VDMs have an independent coordinate value. The relative position between upper and lower VDMs was decided via labial-buccal surface data from upper and lower casts placed at the intercuspal position. Step3 : The Virtual Reality crown (VR crown) was designed via Freeform and Phantom Omni. VDM data from functional occlusal surface was removed from crown data, and occlusal contact points were set and masked. The occlusal surface was shaped without modifying the occlusal contact. Abatement teeth data was removed from crown data. Step4 : The dental crown wax pattern was modeled from VR crown data via 3D printer. Occlusal contacts were assessed at the whole dentition, with/without CAD/CAM crown via an articulator, using silicone. The vertical gap between the finish line on the abutment teeth and the margin on the dental crown was 28±5μm in the conventional crown, 35±13μm in the CAD/CAM crown. The real crown's occlusal contacts almost corresponded with its VR crown. Conclusion : We developed a novel CAD/CAM system which can design functional occlusal surfaces via a modified FGP technique. The marginal fit in our CAD/CAM crown was sufficient for clinical application.
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