| Project/Area Number |
60480449
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
小児・社会系歯学
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| Research Institution | Okayama University |
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Principal Investigator |
WATANABE Tatsuo (1986-1987) Professor, Okayama University Dental School, 歯学部, 教授 (20034176)
渡辺 達夫 (1985) 岡山大学, 歯学部, 教授
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| Co-Investigator(Kenkyū-buntansha) |
KIMURA Toshihide Assistant, Okayama University Dental School, 歯学部附属病院, 助手 (30186324)
TSURUMI Mayumi Assistant, Okayama University Dental School, 歯学部, 助手 (00172073)
NISHIGAWA Mariko Assistant, Okayama University Dental School, 歯学部, 助手 (10170599)
MORITA Manabu Lecturer, Okayama University Dental School, 歯学部附属病院, 講師 (40157904)
KISHIMOTO Etsuo Assistant Professor, Okayama University Dental School, 歯学部, 助教授 (20091316)
小泉 和浩 岡山大学, 歯学部, 助手 (40178182)
岡崎 眞奈美 岡山大学, 歯学部, 助手 (30177042)
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| Project Period (FY) |
1985 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥6,300,000 (Direct Cost: ¥6,300,000)
Fiscal Year 1987: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1986: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1985: ¥4,200,000 (Direct Cost: ¥4,200,000)
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| Keywords | Periodontal disease / Public health / CPITN / Brushing instruction / Tooth extraction / 公衆衛生 / 歯周病の予防 / スクリーニングテスト / 抜歯の原因 / 地域活動 / 事後措置 |
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| Research Abstract |
Rate of the old-aged persons are increasing, and periodontal disease is vovering over old ages. To get long life span of our teeth, good preventive methods for periodontal disease are needed. The objects of this project were as follows : 1. survey of prevalence of periodontal disease, 2. evaluation of preventive method of the disease in the public.
By the study about 11,385 of extracted teeth, the main reasons were dental caries ( 56% ) and periodontal disease ( 38% ). More than 50% of teeth were extracted by periodontal disease in 46-55 years. Rate of extracted teeth by periodontal disease was higher in male than in female. The prevalence of periodontal disease were analyzed using CPITN. 98% of freshmen of the University out of 2,228 were with periodontal disease. In the study of 957 inhabitants, prevalence of periodontal disease was 99.6% and 18% of them were with severe periodontitis. The severe periodontitis was increasing with age. Comparing with the female, the male showed high prevalence of severe periodontitisl.
Tooth brushing is a useful measure to cure and prevent periodontal disease. To evaluate the effect of tooth brushing instruction in public, 40 participants were studies. Periodontal health improved after 2 weeks of tooth brushing instruction, and that good condition was kept during one year.
Also 330 male workers at the Waterworks Bureau were instructed in the tooth brushing method, Tooth Pick Method using one-raw brush following oral examination. The effect of the instruction was evaluated after one and half years. All clinical signs were significantly improved ( X^2-test ) by the instruction of 3 minutes.
In conclusions, periodontal disease is spread almost all adults, and becomes worse with age. These results of this study suggest that an appropriate tooth brushing should be instructed to adults to prevent periodontal disease in the public health.
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