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Histologic assessment of the biological effects after speedy surgical orthodontics in a beagle animal model: a preliminary study

비글견에서 급속수술교정 치료 후 생물학적 효과에 대한 조직평가: 예비연구

  • Kim, Hong-Suk (Department of Orthodontics, School of Dentistry, Kyung Hee University) ;
  • Lee, Young-Jun (Department of Orthodontics, School of Dentistry, Kyung Hee University) ;
  • Park, Young-Guk (Department of Orthodontics, School of Dentistry, Kyung Hee University) ;
  • Chung, Kyu-Rhim (Department of Dentistry, School of Medicine, Ajou University) ;
  • Kang, Yoon-Goo (Department of Orthodontics, School of Dentistry, Kyung Hee University) ;
  • Choo, Hye-Ran (Department of Craniofacial Orthodontics, Childrens' Hospital of Phildelphia) ;
  • Kim, Seong-Hun (Department of Orthodontics, School of Dentistry, Kyung Hee University)
  • Received : 2010.11.24
  • Accepted : 2011.06.07
  • Published : 2011.10.30

Abstract

Objective: Speedy surgical orthodontics (SSO), an innovative orthodontic treatment, involves the application of orthopedic forces against temporary skeletal anchorage devices following perisegmental corticotomy to induce movement of specific dental segments. Herein, we report the biological effects of SSO on the teeth and periodontal structures. Methods: Five beagle dogs were divided into 2 groups and their 6 maxillary incisors were retracted $en$ $masse$ by applying 500 g orthopedic force against a single palatal mini-plate. Retraction was performed without and with perisegmental corticotomy in groups I and II, respectively. All animals were killed on the 70th day, and their periodontal structures were processed for histologic analyses and scanning electronic microscopy (SEM). The linear distance between the third maxillary incisor and canine was used as a benchmark to quantify the retraction amount. Results: Retraction was markedly faster and retraction amount greater in group II than in Group I. Surprisingly, Group II did not show any root resorption despite extensive retraction, while Group I showed prominent root surface irregularities. Similarly, SEM showed multiple resorption lacunae in Group I, but not in Group II. Conclusions: SSO is an effective and favorable orthodontic approach for major en masse retraction of the maxillary anterior teeth.

Keywords

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