| Project/Area Number |
16591954
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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 | HIROSHIMA UNIVERSITY |
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Principal Investigator |
YOSHIDA Mitsuyoshi Hiroshima University, Graduate school of Biomedical Sciences, Research Associate, 大学院・医歯学総合研究科, 助手 (50284211)
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| Co-Investigator(Kenkyū-buntansha) |
AKAGAWA Yasumasa Hiroshima University, Graduate school of Biomedical Sciences, Professor, 大学院・医歯学総合研究科, 教授 (00127599)
TSUGA Kazuhiro Hiroshima University, Graduate school of Biomedical Sciences, Associate Professor, 大学院・医歯学総合研究科, 助教授 (60217289)
TAJI Tsuyoshi Hiroshima University, Hospital, Research Associate, 病院・助手 (80284214)
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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 |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2005: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2004: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | Tongue pressure / Swallowing |
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| Research Abstract |
We developed a device for tongue pressure (TP) measurement (Grant- in aid for scientific research (C) 14571845) and found out a deterioration of TP in the elderly (Int.J.Prosthodont, 2002). Then, an idea that the deterioration of TP would take part in the delay of swallowing by aging occurred to us.
In measuring TP by our device, central incisors gently touch the probes, and lips are closed in the same manner as when sipping with a straw. It means this is a situation of slight opened mouth. So, additional examination was started to know whether there was a possibility that data of TP during swallowing measured by our device might be different from TP during swallowing in daily life. The comparison between data under the condition of closed mouth from KAY co.'s TP device and data from our device was done. And we found out that the data quality of ours is as same as KAY's.
In addition, whether the presence of occlusal contact during the preparation stage had an influence on swallowing function in the elderly were examined by Videofluorography. Results were 1;occlusal contacts were found with a significantly greater frequency and occurrence in the elderly than young people and 2;pharyngeal close and laryngeal elevation were started earlier in the elderly who had occlusal contacts than in the elderly who had no occlusal contact.
In our past report, laryngeal penetration was significantly greater in frequency in edentulous elderly when not wearing dentures than in dentulous elderly (JAGS, 2006). Laryngeal penetration is one of risk factors for aspiration pneumonia. Accordingly, the results suggest that jaw stabilization by occlusal contact and keeping appropriate tongue pressure might work for a protection from aspiration pneumonia and laryngeal penetration in the elderly who reduced neuromuscular reserve by aging.
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