ラット下顎第一臼歯部の実験的な歯の移動による歯周組織の変化

• 荻原 栄和

  日本歯科大学歯学部附属病院小児・矯正歯科

• 相山 誉夫

  日本歯科大学歯学部解剖学第二講座

書誌事項

タイトル別名

• Changes in Periodontal Tissue Applying Experimental Tooth Movement in the Mandibular First Molar of Rats
• Comparison of Effects of Active Plate Model Wire Spring Model?
• 床装置モデルとワイヤースプリング装置モデルの比較

抄録

Although lateral expansion of the mandibular dental arch is not a general treatment in clinical pediatric dentistry and orthodontics, we have performed such expansion using active plate appliances. In this study, the influence of active plate appliances and wire-spring appliances on tooth movement and on periodontal tissue was investigated. Buccal movement (expansion) of the mandibular first molar area in rats was performed applying the force of approximately 10 g for 1,3,5,7, and 14 days, using active plate appliance models (Ap group), or wire-spring appliance models (Wi group). The distance of the tooth movement in the central fossa area of the bilateral first molars was measured, and significant differences in the distance in the experimental period were evaluated. Furthermore, changes in the buccal periodontal tissue were observed with an optical microscope using various staining methods, and observed with confocal laser microscope using time descriptive methods.<BR>The amount of tooth movement showed no significant differences between Ap and Wi groups. The pattern of tooth movement showed 5 phases in Ap group, and 3 phases in Wi group. Although degeneration of the tissue on the compressed side accompanying tooth movement was noted until the seventh day both in Ap and Wi groups, it disappeared on the 14th day in Ap group. Remodeling of the buccal alveolar bone was observed in the area ranging from the alveolar crest to the basal side on the periosteal surface of the alveolar bone in Ap group, whereas bone induction was found only in the alveolar crest in Wi group. These findings suggested that lateral expansion of the mandibular dental arch is possible by using active plate appliances in clinical pediatric dentistry and orthodontics.

収録刊行物

• The Japanese Journal of Pediatric Dentistry

  The Japanese Journal of Pediatric Dentistry 41 (1), 94-104, 2003

  The Japanese Society of Pediatric Dentistry

キーワード

• 下顎
• 側方拡大
• 実験的歯の移動
• 床装置
• ラット

詳細情報

• CRID: 1390001204684837120
• NII論文ID: 130004634493
• DOI: 10.11411/jspd1963.41.1_94
• ISSN: 05831199
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可