| Project/Area Number |
61570922
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
補綴理工系歯学
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| Research Institution | Tokyo Medical and Dental University |
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Principal Investigator |
FUKUDA Hideaki Tokyo Medical and Dental University ・ Instructor, 医用器材研究所, 助手 (50014163)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAYAMA Yoshiaki Tokyo Medical and Dental University ・ Instructor, 歯学部, 助手 (80143593)
NAGAI Masahiro Tokyo Medical and Dental University ・ Instructor, 医用器材研究所, 助手 (10013971)
MIYAIRI Hiroo Tokyo Medical and Dental University ・ Professor, 医用器材研究所, 教授 (50013892)
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| Project Period (FY) |
1986 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1987: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1986: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Injection system / Simlified molding method / Polysulfone / Thinning / Molding condition / Flexural strength / ポリエーテルスルフォン / 薄肉レジン床義歯 |
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| Research Abstract |
The manufacture of the denture bases was examined by using the injection molding system, varing the location of sprue and number of sprues for molding denture base. The resins used were polymethylmathacrylate(PMMA), polysulfone(PSF) and polyethersulfone(PES).
The mechanical properties of these denture bases, stiffness and strength, were investigated by 4-point bending system. The specimen for bending test was constrained with steel plates to the right and left molar sides of dentures, and then the bending moment is loaded on two steel plates.
The results obtained were as follows:
(1) The location of sprues were optimum at right and left sides of denture edge, using two sprues with 6 mm in diameter.
(2) the working houres were shorter than that of usual ones.
(3) The adjustment of denture bases was good comparing with that of usual ones.
(4) The mechanical properties of PSF and PES-dentures were excellent comparing with that of usal ones.
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