2006 Fiscal Year Final Research Report Summary
Multi-center research on prosthodontic treatment for patients with shortened dental arch
| Project/Area Number |
16209058
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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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 (2005-2006)
Matsumoto Dental University (2004) |
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Principal Investigator |
IGARASHI Yoshimasa Tokyo Medical and Dental University, Prosthodontics, Professor, 大学院医歯学総合研究科, 教授 (20107303)
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| Co-Investigator(Kenkyū-buntansha) |
IKEBE Kazunori Osaka University, Prosthodontics, Lecturer, 大学院歯学研究科, 講師 (70273696)
KOBAYASHI Hiroshi Niigata University, Prosthodontics, Associate Professor, 大学院医歯学総合研究科, 助教授 (00225533)
AKAGAWA Yasumasa Hiroshima University, Prosthodontics, Professor, 大学院医歯薬学総合研究科, 教授 (00127599)
ISHIGAMI Tomohiko Nihon University, Prosthodontics, Professor, 歯学部, 教授 (70191872)
YAMASHITA Shuichiro Matsumoto Dental University, Prosthodontics, Professor, 大学院歯学独立研究科, 教授 (80242212)
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| Project Period (FY) |
2004 – 2006
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| Keywords | Occlusal unit / Oral health related quality of life / OHIP-J / Missing tooth / Occlusal support / Shortened dental arch |
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| Research Abstract |
The aim of this study was to investigate the relationship between missing occlusal units and oral health-related quality of life in subjects with the shortened dental arch(SDA). The SDA subjects were recruited at 6 University-based prosthodontic clinics consecutively for one month (June, 2006). In total, 116 SDA subjects participated (mean age 58.5 +/- 10.0 yrs, 71% female). The location and number of missing teeth of these subjects were examined and the number of missing occlusal units (one unit corresponds to a pair of occluding premolars ; a pair of occluding molars corresponds to two units) was calculated. To evaluate OHRQoL Oral Health Impact Profile Japanese version (OHIP-J) was administered to each subject and the summary score of OHIP-J was calculated. A regression analysis investigated the association between missing occlusal units (independent variable) and the OHIP-J summary (dependent variable). The analysis revealed that more missing occlusal units were associated with a higher OHIP-J summary score, i.e., more impaired OHRQoL. One missing occlusal unit was related to an increase of 1.9 OHIP-J units (95% confidence interval : 0.3-3.6, P=0.03). Our results suggest that missing occlusal units are related to impaired oral health-related quality of life in subjects with a shortened dental arch.
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