| Project/Area Number |
61304054
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Conservative dentistry
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| Research Institution | Nagasaki University |
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Principal Investigator |
IHACHI KATO School of Dentistry, Nagasaki University, 歯学部, 教授 (30005087)
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| Co-Investigator(Kenkyū-buntansha) |
YOJI MURAYAMA Dental School, Okayama University, 歯学部, 教授 (50029972)
ISAO ISHIKAWA School of Dentistry, Tokyo Medical and Dental University, 歯学部, 教授 (10014151)
KOHJI HARA School of Dentistry, Niigata University, 歯学部, 教授 (20018419)
DAISUKE SANJO School of Dentistry, Tohoku University, 歯学部, 教授 (70013943)
HIROSHI KATO School of Dentistry, Hokkaido University, 歯学部, 教授 (60001020)
砂田 今男 東京医科歯科大学, 歯学部, 教授 (50005013)
上野 和之 岩手医科大学, 歯学部, 教授 (00048307)
松本 光吉 昭和大学, 歯学部, 教授 (80038885)
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| Project Period (FY) |
1986 – 1988
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥13,700,000 (Direct Cost: ¥13,700,000)
Fiscal Year 1988: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1987: ¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1986: ¥6,500,000 (Direct Cost: ¥6,500,000)
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| Keywords | Endodontal Periodontal Lesion / Furcation Lesion / Accessory Canal / Furcation Canal / Root Fracture / Perforation / 細菌叢 / 歯内 / 歯周病変 / 破折 |
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| Research Abstract |
We give an outline of this study. 1.Analysis of the clinical state on endodontal periodontal lesion: We collected specimens and classified them according to case histories, clinical findings and radiographical findings. Then we compared the histopathological state of the dental pulp with the clinical state. And the relationships between the proteinases such as elastase, cathepsins B, H and L in gingival crevicular fluid and clinical states were examined. 2.The study on the combination of periodontal and endodontal lesions: 1 We examined the frequency of accessory canals using the methods of Replica, SEM and image analysis. 2 We studied the diagnosing method by measuring the electric resistance value between root canal and periodontal tissue. 3 We examined the spreading pathway of inflammation from the pursuit of the derection of tissue fluid flow. As a result, endodontic lesion easily spread periodontal tissue, but only periodontal lesion with severe periodontal breakdown spread the pulp and the maxillary sinus. 3.The study on bacterial flora: Microbial density was low in root canals, but it was high in periodontal pockets. Cultivable bacterial flora was simpler than that in root canals. IgG antibody titers to some specific bacterias were high, but the kind of bacteria was different case by case. Then we examined the relationship between the treatment and the change of bacterial flor a(especially anaerobe) in root canals and periodontal pockets. As for the total number of bacteria, we could neither detect any bacteria in the canal by just one root canal treatment, nor did we find any change of the number in periodontal pockets just only by the treatments. 4.The study on the treatment: We histopathologically observed the periodontal wound healing in the case of animal tooth reimplantation. Blood coagulation factor FXIII was effetive on the wound healing.
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