JOURNAL OF SHANDONG UNIVERSITY (HEALTH SCIENCES) ›› 2010, Vol. 48 ›› Issue (10): 29-33.

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Micro CT study of orthodontic loading on the prognosis of auto-transplanted teeth 

XUE Han1， DU Wen-ting2， GUO Jing3   

  1. 1. School of Stomatolgy, Shandong University, Shangdong Provincial Key Laboratory of Oral Biomedicine,
     Jinan 250012, China;   2. Department  of stomatology, Municipal Laiyang Central Hospital, Yantai 265200, Shandong, China;
    3. Department of Orthodontics, Stomatological Hospital of Shandong Province, Jinan 250012, China
  • Received:2010-01-26 Online:2010-10-16 Published:2010-10-16

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Abstract:

Objective    To study the influence of orthodontic movement on the prognosis of autotransplanted teeth with Micro CT by establishing an animal model of autotransplantation teeth in dogs. Methods    In 4 dogs,16 central incisors were chosen as experimental teeth. Orthodontic loading was conducted in  the 1st, 4th, 8th and 12th week after autogenous teeth transplantation. At the end of first month, teeth and pieces of bones, including periodontal tissues, were scanned by Micro CT. The relevant parameters were analyzed by morphological observation, digital software analysis and three-dimensional reconstruction. Results    The transplanted teeth loaded at the fourth and the eighth week showed no significant ankylosis and root resorption morphologically, were without obvious periodontal ligament space broadening and apical alveolar bone density diminution. Bone architecture quantization comparison presented the least apical trabecular bone damage and the lowest trabecular bone dispersion. Conclusion    From experimental data obtained with Micro CT, it can the concluded that loading the autotransplanted teeth at the fourth to eighth week after transplantation can prevent ankylosis without an increase of root resorption.

Key words: Autogenous tooth transplantation； Orthodontics； Micro CT； Animal study

CLC Number: 

  • R783.5
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