대한치과교정학회지 (The korean journal of orthodontics)

  • 제38권3호
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  • Pages.159-174
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  • 2008
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  • 2234-7518(pISSN)
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  • 2005-372X(eISSN)
대한치과교정학회 (The Korean Association Of Orthodontists)
권호 표지

백서의 치아이동 시 피질골 천공이 치주조직의 OPG, RANK, RANKL의 발현에 미치는 영향

The effect of cortical punching on the expression of OPG, RANK, and RANKL in the periodontal tissue during tooth movement in rats

  • 박우경 (부산대학교 치과대학 치과교정학교실) ;
  • 김성식 (부산대학교 치과대학 치과교정학교실) ;
  • 박수병 (부산대학교 치과대학 치과교정학교실) ;
  • 손우성 (부산대학교 치과대학 치과교정학교실) ;
  • 김용덕 (부산대학교 치과대학 구강악안면외과학교실) ;
  • 전은숙 (부산대학교병원 의학연구소) ;
  • 박미화 (부산대학교병원 의학연구소)
  • Park, Woo-Kyoung (Department of Orthodonitcs, School of Dentistry, Pusan National University) ;
  • Kim, Seong-Sik (Department of Orthodonitcs, School of Dentistry, Pusan National University) ;
  • Park, Soo-Byung (Department of Orthodonitcs, School of Dentistry, Pusan National University) ;
  • Son, Woo-Sung (Department of Orthodonitcs, School of Dentistry, Pusan National University) ;
  • Kim, Yong-Deok (Department of Oral & Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Jun, Eun-Sook (Medical Science Research Institute, Pusan National University Hospital) ;
  • Park, Mi-Hwa (Medical Science Research Institute, Pusan National University Hospital)
  • 발행 : 2008.06.30
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초록

치아이동 시 피질골 천공이 치조골 재형성에 미치는 영향을 알아보기 위해서 생후 15주된 자성백서를 사용하여 피질골 천공 후 치아이동을 실시한 실험군(Tooth movement with cortical punching: TMC group, n = 16)과 교정적 치아이동만 실시한 대조군(Tooth movement only group: TM group, n = 16)의 치아주위조직을 면역조직화학염색을 통하여 관찰하였다. 실험군과 대조군의 실험동물에 20 gm의 힘으로 상악 전치부 사이를 이개시키는 치아이동을 시행하였으며 실험군에서는 상악 전치부 구개부위에 피질골 천공을 실시하였다. 치아이동 후 1, 4, 7, 14일째에 실험군과 대조군의 실험동물을 희생시켰다. 면역조직화학염색법으로 OPG, RANK, RANKI의 발현을 비교한 결과, OPG의 발현은 양 군 모두에서 미처치 대조군에 비하여 감소되었으나, 실험군에서의 발현이 대조군보다 컸으며, RANK, RANKL은 피질골 천공을 시행한 경우에 더 강한 발현을 보이는 것이 관찰되었다. 따라서 피질골 천공이 치주조직의 OPG, RANK, RANKL의 발현에 영향을 미치며 치조골의 재형성을 향상시키는 것을 알 수 있었다.

Objective: The purpose of this study was to investigate whether cortical punching could stimulate the expression of OPG, RANK, and RANKL during tooth movement by immunohistochemistry. Methods: 34 sprague-dawley rats (15 weeks old) were allocated into 3 groups: TMC group (experimental group; Tooth Movement with Corticotomy, n = 16), TM group (control group; Tooth Movement only group, n = 16), and non-treatment group (n = 2). 20 gm of orthodontic force was applied to rat incisors by inserting elastic bands. The duration of force application was 1, 4, 7 and 14 days. A microscrew (diameter 1.2 mm) was used for cortical punching of the palatal side of the upper incisors in the TMC group. Results: Distributions of OPG, RANK, and RANKL were evaluated by immunohistochemistry. OPG, RANK and RANKL were observed on experimental and control groups. On the compression side, the degree of the expression of OPG decreased in both groups. The expression of RANK was most prominent in the experimental group of day 4. The expression of RANKL was most intensive and extensive in the experimental group of day 7. However, the expression of OPG was decreased in the experimental and control groups compared to the non treatment group. The expression of OPG, RANK and RANKL after force application were decreased at day 14. Conclusions: These findings suggested that cortical punching might stimulate remodeling of alveolar bone during a 2 week period of tooth movement without any pathologic change.

키워드

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