| Project/Area Number |
09672097
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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 |
矯正・小児・社会系歯学
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| Research Institution | Department of Oral Science, National Institute of Infectious Disease (2000)
Niigata University (1997-1999) |
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Principal Investigator |
ANDO Yuichi National Institute of Infectious Disease, Department of Oral Science, Manager, 口腔科学部, 室長 (80168046)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIHARA Akihiro Niigata University, Department of Preventive Dentistry, School of Dentistry, Assistant Professor, 歯学部附属病院, 助手 (50201033)
矢野 正敏 (矢野 正敬) 新潟大学, 歯学部, 助手 (30200562)
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| Project Period (FY) |
1997 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2000: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1999: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | Tooth loss / Risk factor / Longitudinal study / Community-dwelling adults / 現在歯数 / 歯の喪失リスク / う蝕 / 歯周病 / 後ろ向きコホート調査 / 歯の動揺 / 成人 / コホート調査 / ベースライン調査 / ロジスティック回帰分析 |
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| Research Abstract |
The purpose of this study was to evaluate three-year incidence of and risk factors for tooth loss in community-dwelling adults. Subjects were 269 (male 128,female 141) dentate adults in a town of Niigata Prefecture who visited both oral examination that were carried out in 1997 (baseline examination) and 2000 (follow-up examination). The follow-up rate was 37.2%. The average age at baseline was 60.6 (SD=12.8). We used multiple-logistic regression model to quantify tooth-specific and person-level risk factors for tooth loss by using variables of oral examination and questionnaire at baseline.
Three-year incidence of tooth loss was 4.9% in tooth-level, 48% in person-level. The average number of missing teeth per year was 0.33.
The results of person-level multiple logistic regression analysis showed that tooth loss was more common in persons with 10-27 present teeth, decayed teeth, oral symptom, history of dental visit within a year and habit not using interdental brush or dental floss. By using tooth-level multiple logistic regression analysis showed that incidence of tooth loss is higher in wisdom tooth, decayed tooth, crowned tooth, abutment tooth of bridge and tooth with mobility.
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