Journal of the Korean Association of Oral and Maxillofacial Surgeons

The Korean Association of Oral and Maxillofacial Surgeons (대한구강악안면외과학회)
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IMMUNOHISTOCHEMICAL STUDY OF OSTEOPONTIN EXPRESSION IN THE DISTRACTED BONE AFTER CANINE MANDIBULAR DISTRACTION OSTEOGENESIS

성견 하악골 신장술 후 신생골조직에서 Osteopontin 발현에 대한 연구

  • Byun, June-Ho (Department of Oral & Maxillofacial Surgery and Institute of Health Science, Research Institute of Life Science, Gyeongsang National University) ;
  • Park, Bong-Wook (Department of Oral & Maxillofacial Surgery and Institute of Health Science, Research Institute of Life Science, Gyeongsang National University) ;
  • Sung, Iel-Yong (Department of Oral & Maxillofacial Surgery, College of Medicine, Ulsan University) ;
  • Cho, Yeong-Cheol (Department of Oral & Maxillofacial Surgery, College of Medicine, Ulsan University) ;
  • Kim, Jong-Ryoul (Department of Oral & Maxillofacial Surgery, College of Dentistry, Pusan National University)
  • 변준호 (경상대학교 의과대학 구강악안면외과학교실, 경상대학교 건강과학연구원, 경상대학교 생명과학연구원) ;
  • 박봉욱 (경상대학교 의과대학 구강악안면외과학교실, 경상대학교 건강과학연구원, 경상대학교 생명과학연구원) ;
  • 성일용 (울산대학교 의과대학 구강악안면외과학교실) ;
  • 조영철 (울산대학교 의과대학 구강악안면외과학교실) ;
  • 김종렬 (부산대학교 치과대학 구강악안면외과학교실)
  • Published : 2006.10.30
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Abstract

Purpose: This study was aimed at evaluating the histological changes of new bone and expression of osteopontin (OPN) after mandibular distraction osteogenesis. Materials and Methods: Unilateral mandibular distraction (0.5 mm twice per day for 10 days) was performed in eight adult dogs. Two animals were sacrificed at 7, 14, 28 and 56 days after completion of distraction, respectively. The distracted bones and contralateral non-distracted control bones were harvested and processed for histological and immunohistochemical examinations. Results: The new bone was arranged to tension direction after distraction osteogenesis. 7 days after distraction, numerous osteoblasts lining the immature trabecular bone and fibroblast-like cells in the fibrous intrezone were observed. 14 days after distraction, the new formed trabecular bones were thickened compared with 7 days after distraction. 28 days after distraction, the fibrous interzone was almost filled with newly calcified bone, and it was more hardened at 56 days after distraction. Increased OPN signals detected in the osteoblasts lining the trabecular bone and fibroblast-like cells in the fibrous interzone at 7 and 14 days after distraction. At 28 days after distraction, the OPN was weakly expressed in the osteoblasts, and it was not detected in all cellular components of distracted bone at 56 days later of distraction. Conclusions: After distraction osteogenesis, the distracted zone was completely calcified during the 56 days of consolidation period. In this study, the staining intensity of OPN increased in the osteoblasts and fibroblast-like cells at 7 and 14 days after distraction. The expression pattern of this protein shown here suggested that OPN play an important role in the osteogenesis during the early consolidation period.

Keywords

References

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