| Project/Area Number |
07672108
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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 | Tokyo Medical and Dental University |
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Principal Investigator |
MORIZAWA Masayuki Tokyo Medical and Dental University, Faculty of Dentistry, Assistant, 歯学部, 助手 (40191019)
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| Co-Investigator(Kenkyū-buntansha) |
HAYAKAWA Iwao Tokyo Medical and Dental University, Faculty of Dentistry, Assistant Professor, 歯学部, 助教授 (60014172)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1996: ¥200,000 (Direct Cost: ¥200,000)
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| Keywords | Soft lining Material / Complete Denture / Mastication / Occlusal Contact / Masticatory Movement / 筋電図 |
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| Research Abstract |
Soft lining materials have been used clinically for complete denture wearers with severely atrophic residual ridge and chronic pain. Even though this kind of material has been working successfully, the mechanism has not been clearly demonstrated yet.
The purpose of this study is to investigate the influence of soft lining material on occlusal contacts of complete dentures. 71 aged edentulous female was selected for this study. After occlusal adjustment of complete dentures was completed, occlusal surfaces were replaced by metal with the same occlusal countour. Occlusal contacts were investigated in the premolar and the molar regions (Control). Then this mandibular complete denture was relined with soft linig material (Krepeet dough, Kurecha) and occlusal contacts were also investigated in the same way (S Type).
The results were as follows :
1. The frequency of mastication using S Type was decreasing in comparison with Control.
2. In the nonworking side, duration of occlusal contact in the first term of mastication of S Type was short in comparison with Control.
3. Time lag of difference of beginning of occlusal contact between the working side and the nonworking side of S Type was short in comparison with Control.
These results suggested that soft lining material decreased the mobility of complete dentures and that use of soft lining material was one of efective options for improvement of masticatory function of complete denture wearers.
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