| Project/Area Number |
09672019
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Matsumoto Dental University |
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Principal Investigator |
SAKOH Mitsuo Matsumoto Dental University, School of Dentistry, Research associate, 歯学部, 助手 (90225855)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1998: ¥100,000 (Direct Cost: ¥100,000)
Fiscal Year 1997: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | Soft Lining Material / Candida albicans / Anti-microbial agents / Mechanical properties / Anti-Bacterial substance |
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| Research Abstract |
Many reports have pointed out that Candida albicans is one of the main causative factors of denture stomatitis.Test Soft lining materials (Methyl Methacrylate and Vinyl Poly Siloxane) containing the anti-microbial (A-M) agents have developed for the prevention of denture stomatitis.Mechanical properties and bacteriostasis were analyzed about the influence of A-Magents.A-M agents was contaminated and immersed to the the Soft lining materials as 1,2,3,5, and 7 weight percent respectively.Shore hardness, Water sorption and Antibacterial ability were tested with these materials.Bacterial colonies were counted on the GPLP agar preparations on the tested pieces.Test Soft lining materials containing 3 % of A-M agents were developed from the results of denture polymers.
Following results were concluded : All mechanical properties were scarcely influenced by containing A-M agents.Bacteriostasis was clearly approved in the test polymers containing over 2 % of A-M agents without degrading the mechanical properties of Soft lining materials. Shore hardness test was scarcely influenced by containing A-M agents in Soft lining materials.Bacteriostasis was clearly observed in test Soft lining materials containing 2 % of A-M agents with and without thermal cycling test.
When A-M agents containing the above ratios were increased, the setting time extended. It seemed that the A-M agents were affected by the catalyst of Soft lining materials.
I conculded that, when good properties were providcd by the fixcd ratios of A-M agents and composition of Soft lining materials, the setting time was short.
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