title: [The influences on mandibular development after removing the outer cortex of mandibular body in childhood minitype pigs].
abstract: OBJECTIVE
  To study the influences on mandibular development after removing the outer cortex of mandibular body in childhood minitype pig.
  
  
  METHODS
  Six childhood minitype pigs were selected as the experimental animals. The outer cortex of mandibular body measured as 3.0 cm x 1.5 cm was removed in one side, and the other side remained intact as the control. The changes of mandibular modality and occlusion relationship as well as the histological and biomechanical changes were studied 24 weeks after operation.
  
  
  RESULTS
  There was no obvious difference compared with the control side in the height of the mandibular ramus and the length of the mandibular body, However, lateral deviation occlusion was found in some animals. The body thickness was thinner than that of the control side, there were no obvious biomechanical and histological differences between the two sides.
  
  
  CONCLUSIONS
  There was less influence on the growth of mandibular bone after removing one side of the outer cortex of the mandibular body in childhood minitype pig. But further study should be done for the cause of the lateral deviation of the mandible in part of the animals.
authors.affiliation: Department of Craniomaxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical Collage, Beijing 100041, China.
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Lai
authors.initials: L
authors.lastname: Gui
authors.forename: Ji-Chang
authors.initials: JC
authors.lastname: Wang
authors.forename: Xiao-Un
authors.initials: XU
authors.lastname: Tang
authors.forename: Dong
authors.initials: D
authors.lastname: Yu
authors.forename: Zong-Mei
authors.initials: ZM
authors.lastname: Zheng
authors.forename: Bin
authors.initials: B
authors.lastname: Song
mesh_terms: D000818:Animals; D005260:Female; D008297:Male; D008334:Mandible / Q000254:growth & development* / Q000601:surgery; D008335:Mandibular Condyle / Q000601:surgery*; D010027:Osteotomy / Q000009:adverse effects*; D013552:Swine; D013556:Swine, Miniature