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A study on host-parasite interactions in human periodontal pockets.

Research Project

Project/Area Number 06454541
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Conservative dentistry
Research InstitutionTokushima University

Principal Investigator

EBISU Shigeyuki  University of Tokushima, School of Dentistry, Professor, 歯学部, 教授 (50116000)

Co-Investigator(Kenkyū-buntansha) TAGAWA Chisato  University of Tokushima, School of Dentistry, Research Associate, 歯学部・附属病院, 助手 (90253210)
NOIRI Yuichiro  University of Tokushima, School of Dentistry, Research Associate, 歯学部, 助手 (50218286)
MATSUO Takashi  University of Tokushima, School of Dentistry, Associate Professor, 歯学部, 助教授 (30173800)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥6,400,000 (Direct Cost: ¥6,400,000)
Fiscal Year 1995: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1994: ¥4,500,000 (Direct Cost: ¥4,500,000)
KeywordsPeriodontitis / Periodontal pocket / Subgingival plque / Spirochetes / Periodontal tissue destruction / T cell / B cell / スペロヘ-タ / 歯周病原細菌 / アポトーシス
Research Abstract

We observed subgingival plaque in 18 severe adult-periodontitis affected teeth by scanning electron microscopy. In the apical one-third zone of periodontal pockets, several bacterial species aggregated with glycocalyx-like structures, which comprised net-like and mucoidal structure. In the so-called "plaque-free" zone, two types of bacterial adherence were observed : bacterial cell walls directly contacted with the root surface, and microorganisms adhered to the root surface mediated by the glycocalyx net-like materials.
After Providing informed consent, 30 teeth with severe advanced adult periodontitis were extracted, and the plaque-free zones were investigated with specific antibodies against four periodontal diseaseassociated bacteria by a scanning immunoelectron microscopy method. Porphyromonas gingivalis was actually found in the plaque-free zones in four of the seven samples examined, and Treponema denticola was detected in five of nine samples. Prevotella intermedia occurred in o … More nly one of the seven samples examined, and Actinomyces viscosus was identified in four of the seven samples. More than half of the number of the spirochetes and rods detected by secondary electron imaging in the plaque-free zones did not react positively with the four specific antibodies examined by back-scattered electron imaging. This suggests that several unidentified microorganisms were present in the plaque-free zones in addition to the above four bacterial species.
We also examined immunohitologically the cell densities and distribution of T and B cells in periodontitis, and analyzed their relationship in terms of periodontal tissue destruction. T cells appeared in the low density of infiltrates and increased gradually with the number of total infiltrates, whereas B cells did not appear in the small infiltrates but increased rapidly with the number of infiltrates. The number of fibroblastic cells showed negative correlation with that of the total infiltrates and B cells, but it did not correlate with the number of T cells. These findings suggest that the T cells infiltrated into the imflamed sites at the onset and increased gradually with the development of inflammation, and that B cells infiltrated behind the T cells and their number increased rapidly with inflammation. Less

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 野杁由一郎ら: "ヒト歯肉縁下プラークの研究-プラーク細菌の定着・増殖における細菌バイオフィルムの関与について-" 日本歯周病学会会誌. 37 (2). 329-336 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 野杁由一郎ら: "ヒト歯肉縁下プラークの研究-プラークフリーゾーンにおける歯周病関連細菌の走査免疫電顕法による検索-" 日本歯周病学会会誌. 38 (1). 60-68 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Takashi Matsuo et al.: "A histological analysis of T and B cells in periodontal tissue destruction." Oral Medicine and Pathology. (in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Noiri el al.: "A study on human subgingival plaque-Participation of bacterial biofilms in the colonization of plaque bacteria-" Journal of the Japanese Society of periodontology. 37(2). 329-336 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Noiri et al.: "A study on human subgingival plaque-Qualitative analysis of periodontal disease-associated bacteria in plaque-free zones by a scanning immunoelectron microscopy method-" Journal of the Japanese Society of periodontology. 38(1). 60-68 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Matsuo et al.: "A histological analysis of T and B cells in periodontal tissue destruction" Oral Medicine and Pathology. (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 野杁由一郎ら: "ヒト歯肉縁下プラークの研究-プラークフリーゾーンにおける歯周病関連細菌の走査免疫電顕法による検索-" 日本歯周病学会会誌. 38(1). 60-68 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Takashi Matsuo et al.: "A histological analysis of T and B cells in periodontal tissue destruction." Oral Medicine and Pathology. (in press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 野杁 由一郎,他: "ヒト歯周ポケットにおける異種菌体間相互作用の形態学的検索" 日本歯周病学会会誌. 36秋季特別号. 83 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 多川 知里,他: "歯周炎におけるapoptotic cellの検索" 日本歯周病学会会誌. 36秋季特別号. 188 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 野杁 由一郎,他: "ヒト歯周縁下プラークの研究-プラーク細菌の定着・増殖における細菌バイオフィルムの関与について-" 日本歯周病学会会誌. 37(2),(印刷中). (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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