歯周組織の炎症と咬合性外傷が合併した時のサル歯周組織の変化 : 炎症の程度と咬合性外傷の強さの影響について Periodontal Destruction with Experimental Periodontitis and Occlusal Trauma in Monkeys : Effects According to Severity of Inflammation and Degree of Occlusal Trauma

この論文をさがす

著者

    • 畢 良佳 Bi Liang Jia
    • 北海道大学大学院歯学研究科 Department of Periodontology and Endodontology, Hokkaido University School of Dentistry
    • 加藤 熈 Kato Hiroshi
    • 北海道大学大学院歯学研究科 Department of Periodontology and Endodontology, Hokkaido University School of Dentistry

抄録

歯周組織の炎症と咬合性外傷が合併した場合の歯周組織破壊は炎症の程度と咬合性外傷の強さにどのような影響を受けるかを明らかにする目的で,サルの歯周組織に実験的に程度を変えて炎症を誘発するとともに,咬合性外傷の程度も変えて合併させ,歯周組織の変化を臨床的,X線学的および病理組織学的に観察し計測も行った。その結果,クリニカルアタッチメントロスは炎症が弱い場合は外傷を加えても変化しなかったが,炎症が強い場合は増加した。規格X線写真上の歯槽骨の吸収は,両者が合併すると増加し,炎症が強い方はより著明であった。病理組織学的観察および計測では,炎症のみの場合に比べ炎症と咬合性外傷が合併ししかも両者が強いほど歯槽骨の吸収とアタッチメントロスは増加し,残存する歯間水平線維層の幅は減少した。これらの結果から,炎症と咬合性外傷の合併による歯周組織破壊の進行は歯間水平線維の状態に大きく影響をうけるが,とくに歯間水平線維が強い炎症により破壊され減少すると,外傷力によってさらに線維の断裂や血管の圧迫出血が生じ,炎症性細胞が浸潤しやすくなり,アタッチメントロスが進行するのではないかと考えられた。

The purpose of this study was to investigate the effects of occlusal trauma on periodontal tissues when different degrees of inflammation were combined with traumatic force applied in 1- or 2-directions. Two adult monkeys were used, and inflammation was provoked by silk ligature insertion around the necks of the teeth. The durations of silk insertion were 10 and 20 weeks for the mild (Group A) and the severe group (Group B) periodontitis groups, respectively. After the development of experimental periodontitis, the ligatures were removed. Groups A and B were further devided into 3 groups according to the intensity of traumatic forces. Lateral force was applied from one direction in Groups AI and BI at one week intervals for 5 weeks. In Groups All and BII, elastics were inserted for one week alternately at the mesial and distal surfaces of the experimental teeth for 5 weeks. In the control groups (Groups Ac and Be), no traumatic forces were applied. The monkeys were then sacrificed. The data obtained were evaluated clinically, radiographically and pathologically, and histometric analysis was also performed. The results were as follows: 1) Pl I, GI, and PD showed minimal differences among the groups. The clinical attachment level was unchanged in Groups AI and AII, but was increased in Groups BI and BII. 2) Based on the radiographic examinations, bone loss was more severe in Groups B I and BII than in Groups AI and AII. No significant radiographic difference was noted in relation to the severity of the occlusal trauma. 3) The pathological observation revealed that Groups BI and BII had significantly more attachment loss, bone loss and destruction of transseptal fibers around the bony crest than Groups AI , AII, and Ac. The intensity of occlusal force produced no significant differences. It was thus concluded that, when the applied force exceeds a certain level, tissue with preexisting severe periodontitis will undergo a similar destructive process. Further studies are under way aimed at fully elucidating the role of occlusal trauma in periodontal destruction.

収録刊行物

  • 日本歯周病学会会誌

    日本歯周病学会会誌 38(4), 385-399, 1996-12-28

    特定非営利活動法人日本歯周病学会

参考文献:  46件中 1-46件 を表示

被引用文献:  5件中 1-5件 を表示

各種コード

  • NII論文ID(NAID)
    110004726162
  • NII書誌ID(NCID)
    AN0019129X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03850110
  • データ提供元
    CJP書誌  CJP引用  NII-ELS  J-STAGE 
ページトップへ