title: [Histological changes on the stress side in orthodontic rapid tooth movement through distraction osteogenesis of the periodental ligament on dogs].
abstract: OBJECTIVE
  To study histological changes under the conditions of orthodontic rapid tooth movement through distraction osteogenesis of the periodental ligament on dogs.
  
  
  METHODS
  The experiment was carried out in 6 dogs, the left side of jaws of each one was set as test or control side, and the other side was control or test side. On the control side, the first premolar was moved using traditional methods while the third premolar as anchor, on the test side, using self-made distraction device. The periodental tissue of tooth moved were extracted at the end of the test, some of decalcified sections were stained with hematoxylin and eosin and others with modified Mallory's trichrome staining method, being examined by LM.
  
  
  RESULTS
  Decalcified sections stained with hematoxylin and eosin showed the bone formed actively, and there were a large number of fibroblasts and osteoblasts as well as abundant vascularity. The modified Mallory's trichrome staining method showed the newly formed bone very clearly and distinctly.
  
  
  CONCLUSIONS
  There was no difference in quality but in quantity on the histological reactions in tension side of the tooth moved by traditional method and by distraction osteogenesis through the peridental ligament and periodontal membrane, the latter could induce higher activity of histological synthesization than the former.
authors.affiliation: Department of Orthodontics, School of Dentistry, Xi'an Jiaotong University, Xi'an,710004, China. 98wang-shuang@sohu.com
authors.forename: Shuang
authors.initials: S
authors.lastname: Wang
authors.forename: Xiang-Yu
authors.initials: XY
authors.lastname: Ye
authors.forename: Hong
authors.initials: H
authors.lastname: Zhou
authors.forename: Pei-Xun
authors.initials: PX
authors.lastname: Feng
mesh_terms: D000818:Animals; D004285:Dogs; D005260:Female; D008297:Male; D010012:Osteogenesis; D019857:Osteogenesis, Distraction; D010513:Periodontal Ligament / Q000473:pathology*; D014087:Tooth Movement Techniques / Q000379:methods*