Improvement in wear resistance of indirect composites by means of high-intensity light-polymerizing systems
| Project/Area Number |
16390566
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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 | Nihon University |
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Principal Investigator |
MATSUMURA Hideo Nihon University, School of Dentistry, Professor, 歯学部, 教授 (40199857)
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| Co-Investigator(Kenkyū-buntansha) |
KAKEHASHI Yoshiyuki Nihon University, School of Dentistry, Associate professor, 歯学部, 助教授 (80160993)
SHIMADA Kazuki Nihon University, School of Dentistry, Instructor, 歯学部, 助手 (60307866)
KOIZUMI Hiroyasu Nihon University, School of Dentistry, Instructor, 歯学部, 助手 (20339229)
KAWAMOTO Yoshikazu Nihon University, School of Dentistry, Instructor, 歯学部, 助手 (40366604)
TANOUE Naomi Nagasaki University, Hospital of Medicine and Dentistry, Assistant professor, 医学部・歯学部附属病院, 講師 (70231660)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 2005: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2004: ¥3,400,000 (Direct Cost: ¥3,400,000)
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| Keywords | Composite / Light-polymerizing unit / Primer |
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| Research Abstract |
The aim of this study was to evaluate effect of primer on toothbrush-dentifrice abrasion of composite-metal interface. Flat plate specimens were cast from the T-Alloy H (GC corp.) pure titanium metal. They were air-borne particle abraded with 70 μm alumina, and were either unprimed or conditioned with two types of primers. One primer is designed for noble metals as an Alloy Primer (Kuraray), and the other is the Estenia C&B Opaque Primer (Kuraray) material. An Estenia C&B OA3 (Kuraray) light-polymerized opaque resin and an Estema C&B E1 (Kuraray) indirect composite were bonded to the side of metal specimens. All specimens were stored in 37℃ distilled water for 2 weeks prior to testing. Toothbrush abrasion test was performed with 3.4 N vertical load and 20,000 reciprocal strokes, and used the Crest (P&G) dentifrice. Wear depth was determined by means of a scanning laser microscope (1LM21) and the results were analyzed by Mann-Whitney U test (P=0.05 level). Worn surfaces were observed by scanning electron microscope (S54300). The average wear depths in μm (n=8) with standard deviations in parentheses were 3.5 (0.5) for the primed group and 8.0 (1.4) for the unprimed group. Significant difference was found between the primed group and the unprimed group. Scanning electron microscopic was observed that the opaque resin was conspicuously detected characteristic worn pattern for unprimed specimens, whereas primed specimens did not show apparent worn pattern. It can be considered that application of the primer was useful as enhanced wear resistance of the bonded specimens at the composite-metal interface.
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Report
(3 results)
Research Products
(13 results)
