Effect of Periodontal Alveolar Bony Defect Morphology Caused by Periodontal Disease on Stress within Tooth and Alveolar Bone

DOI Web Site 7 References
  • ENDO Hideaki
    東北大学大学院歯学研究科　口腔生物学講座　歯内歯周治療学分野
  • YAMANO Hiroki
    東北大学大学院歯学研究科　口腔生物学講座　歯内歯周治療学分野
  • SASAKI Tomofumi
    東北大学大学院　口腔機能形態学講座　口腔システム補綴学分野
  • ABE Satoshi
    東北大学大学院　口腔修復学講座　歯科保存学分野
  • ITOH Hidemi
    東北大学大学院　口腔機能形態学講座　口腔システム補綴学分野
  • SHIMAUCHI Hidetoshi
    東北大学大学院歯学研究科　口腔生物学講座　歯内歯周治療学分野
  • KOMATSU Masasi
    東北大学大学院　口腔修復学講座　歯科保存学分野

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Other Title
  • 歯周病に起因する骨欠損形態が歯・歯槽骨内の応力に与える影響
  • シシュウビョウ ニ キインスル コツ ケッソン ケイタイ ガ ハ シソウコツナイ ノ オウリョク ニ アタエル エイキョウ

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It is recognized that the occlusal force is transmitted through the tooth and the periodontal membrane to the alveolar bone. As the periodontal supporting tissue is destroyed by periodontal disease, the occlusal force may tend to concentrate to the remaining tissue. In this study, the mechanical stress to the root apex was experimented by the various conditions of the alveolar bone defects. The quasi-three dimensional photoelastic models of premolar and molar mandibular teeth were used to estimate the stress. These models were loaded up to 98.0N, the color fringe changes were observed. This study suggests that the mechanical stress from the occlusal surface was spread to the wide area of alveolar bone and its surrounding tissue as the load was increased. The stress was concentrated to the root apex regardless of the shape of infrabony defects, and compression and tension of tooth were observed on the root surface. The color fringe pattern was changed by infrabony wall defect.

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