The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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Bone-implant contact and mobility of surface-fronted orthodontic micro-implants in dogs

성견에서 표면처리된 교정용 마미크로 임플랜트의 골 접촉률 및 동요도

  • Park, Seung-Hyun (Department of Orthodontics, College of Medicine, The Catholic University of Korea) ;
  • Kim, Seong-Hun (Department of Orthodontics, College of Medicine, The Catholic University of Korea) ;
  • Ryu, Jun-Ha (Department of Orthodontics, College of Medicine, The Catholic University of Korea) ;
  • Kang, Yoon-Goo (Department of Orthodontics, College of Medicine, The Catholic University of Korea) ;
  • Chung, Kyu-Rhim (Department of Orthodontics, College of Medicine, The Catholic University of Korea) ;
  • Kook, Yoon-Ah (Department of Orthodontics, College of Medicine, The Catholic University of Korea)
  • 박승현 (가톨릭대학교 임상치과학대학원 교정과) ;
  • 김성훈 (가톨릭대학교 임상치과학대학원 교정과) ;
  • 류준하 (가톨릭대학교 임상치과학대학원 교정과) ;
  • 강윤구 (가톨릭대학교 임상치과학대학원 교정과) ;
  • 정규림 (가톨릭대학교 임상치과학대학원 교정과) ;
  • 국윤아 (가톨릭대학교 임상치과학대학원 교정과)
  • Published : 2008.12.30
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Abstract

The purpose of this study was to evaluate the mobility and ratio of the bone-implant contact (BIC) of a sandblasted, large grit and acid-etched (SLA) orthodontic micro-implant. Methods: Ninety-six micro-implants (48 SLA and 48 machined) were implanted in the upper and lower buccal alveolar bone, and palatal bone of four beagle dogs. Two weeks after surgery, orthodontic force (150-200 g) was applied. Two beagles were sacrificed at 4-weeks and the other two at 12-weeks. Histomorphometric comparisons were made between the SLA experimental group and the machined micro-implant as a control group to determine the ratio of contact between the bone and implant. Micro-implant mobility was also evaluated using $Periotest^{(R)}$. Results: Periotest values showed no statistically significant difference in the upper alveolar and palatal bone between groups except for the lower buccal area. BIC in the upper buccal area showed no significant difference between groups both at 4-weeks and 12-weeks. However, both the groups showed a significant difference in BIC ratio in the rest of the experimental areas between 4 weeks and 12 weeks. The experimental group showed active bone remodeling around the bone-implant interface compared to the control group. Conclusions: There were significant differences in the BIC and the Periotest values between the surface-treated and machined micro-implants according to bone quality in the early stage.

본 연구는 비글견에 식립된 sandblasted, large grit and acid-etched (SLA) 표면처리된 교정용 마이크로임플랜트와 평활면 마이크로임플랜트에 교정력을 가한 후 시간 경과에 따른 동요도와 골접촉률의 차이를 규명하기 위해 시행되었다. 비글 성견 네 마리를 이용하여 상, 하악 협측과 구개측 골에 대해 SLA 표면처리된 표면처리군 48개, 평활면의 비처리군 48개의 마이크로임 플랜트 96개를 식립하고 2주의 치유기간 후 교정력(150 - 200 g)을 지속적 으로 가했으며 식립 4주 후에 두 마리를 희생시키고, 12주 후에 나머지 2마리를 희생시켰다. 표면처리군과 비처리군 간의 마이크로 임플랜트의 동요도와 골과 임플랜트 간 접촉률을 조직학적인 측면에서 측정 비교하여 다음과 같은 결과를 얻었다. 상악 협측과 구개측에서는 표면처리군과 미처리군의 동요도에서 유의성 있는 차이가 없었으나 하악협측에서는 표면 처리군이 유의하게 안정적인 동요도를 보였다. 마이크로임플랜트와 인접골 간 접촉률은 상악 협측에서는 4주와 12주 모두 표면처리군과 미처리군 간에 유의 한 차이가 없었으나 하악 협측과 구개측의 경우 4주와 12주 모두 표면처리군이 비처리군에 비해 유의하게 높은 접촉률을 보였다. 표면처리군은 비처리군에 비해 임플랜트 주변에서 활발한 골개조가 관찰되었으며 모든 군에서 이물반응은 관찰되지 않았다. 본 연구를 통해 SLA 표면처리된 마이크로임플랜트는 평활면 마이크로임플랜트에 비하여 식립 초기에는 식립 부위에 따라 유의하게 높은 인접골 간 접촉률과 동요도의 안정성을 보임으로써 다양한 크기와 방향의 교정력의 적용이 가능할 것이라 생각한다.

Keywords

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