Investigation of the non-metal clasp denture based on the load exerted on the abutment tooth and beneath the denture base
Project/Area Number |
24592899
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Prosthetic dentistry
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Research Institution | Tohoku University |
Principal Investigator |
YODA Nobuhiro 東北大学, 歯学研究科(研究院), 助教 (20451601)
|
Co-Investigator(Kenkyū-buntansha) |
SASAKI Keiichi 東北大学, 歯学研究科(研究院), 教授 (30178644)
HAMADA Taizou 東北大学, 歯学研究科(研究院), 客員教授 (50034244)
TAKAHASHI Masatoshi 東北大学, 歯学研究科(研究院), 助教 (50400255)
KAWATA Tetsuo 東北大学, 歯学研究科(研究院), 大学院非常勤講師 (80292225)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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Keywords | ノンメタルクラスプデンチャー / 維持力 / レジンクラスプ / 支台歯荷重 / 三次元荷重 / ノンクラスプデンチャー / 義歯床下粘膜荷重 |
Outline of Final Research Achievements |
Non-metal clasp denture (NMCD) has recently been applied widely as a prosthodontic option. This study aimed to evaluate the retentive forces of NMCDs. Four kinds of NMCDs; polyamide-nylon resin non-metal clasp denture (PA-NMCD), polycarbonate resin non-metal clasp denture (PC-NMCD), polycarbonate resin non-metal clasp denture with a metal frame (mPC-NMCD), and acrylic resin denture (PMMA-CD), were fabricated. Load exerted on a direct abutment tooth during pulling off the denture vertically from the model were measured using a piezo-electric transducer. The mesio-lateral component of the load on the abutment tooth by mPC-NMCD and by PMMA-CD was significantly larger than that by PA-NMCD and by PC-NMCD. The vertical component of the load, i.e. the retentive force of the thermoplastic resin clasp, by PMMA-CD was significantly largest. It was suggested that the NMCD could not exert adequate retentive force as same as the conventional metal clasp when 0.25 mm of under-cut was applied.
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Report
(4 results)
Research Products
(7 results)