2010 Fiscal Year Final Research Report
Significance of multidirectional lip-closing force in healthy elderly persons and influence of prothodontic treatment on this function
| Project/Area Number |
20791450
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Prosthetic dentistry
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| Research Institution | Matsumoto Dental University |
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Principal Investigator |
YAMAGUCHI Masato Matsumoto Dental University, 歯学部, 助手 (30410434)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 口唇系差力 / 口すぼめ / 健常高齢者 / 残存歯数 / アイヒナー分類 |
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| Research Abstract |
The objective of this study was to clarify the characteristics of lip-closing force (LCF) measured by the multidirectional LCF measurement system. In 139 subjects, LCFs in eight directions during maximum voluntary pursing-like lip closure tasks, height, body weight, handgrip strength, dental status and the usage of removable denture were recorded. Summed value of LCFs for all eight directions (total LCF [TLCF]) in male was significantly greater than that in female. The directional LCF (DLCF) was large by vertical, oblique and horizontal directions order. No significant correlation between opposing DLCFs was observed in 3 pairs in male and the symmetric DLCFs were not observed from 4 pairs in female. The significant weak correlation between TLCF and height, body weight were observed in male not in female. TLCF was not statistically related to the number of residual teeth or vertical occlusal support and the preservation of all anterior teeth in both genders. In male, TLCF in the subjects with denture wearing was significantly greater than that without denture wearing.
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