The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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ELECTRON MICROSCOPIC STUDY ON TENSION ZONES OF RAT MOLAR PERIODONTIUM INCIDENT TO ORTHODONTIC TOOTH MOVEMENT

백서 구치의 교정적 치아이동중 장력측 치주조직의 반응에 관한 전자현미경적 연구

  • Lee, Jung Hun (Department of Orthodontics, Division of Dentistry, Kyung Hee University) ;
  • Lee, Ki Soo (Department of Orthodontics, Division of Dentistry, Kyung Hee University)
  • 이정훈 (경희대학교 치과대학 교정학교실) ;
  • 이기수 (경희대학교 치과대학 교정학교실)
  • Published : 1987.09.30
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Abstract

The early tissue reactions in the periodontal tissues of the tension zones following the application of force (30gm) to the maxillary first molar teeth of the albino rats were studied by the light microscopy and electron microscopy The increase of periodontal fibroblasts was evident, particularly in 1 day survival period. Osteoblast differentiation and new bone formation on the alveolar bone surface were occurred from 1 day survival period. Mononuclear phagocytes occurred consistently and in relatively high number adjacent to and at some distance from blood vessel Extensive breakdown of collagen fibers was observed. The increase of the phagocytosis of collagen by the active fibroblasts was evident Also, collagen fibrils were sparse or lost near the macrophage.

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