The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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Non-extraction treatment in Class III malocclusion by using improved superelastic NiTi wire

III급 부정교합 환자에서 초탄성 Ni-Ti alloy wire를 이용한 비발치 치료

  • Min, Sam (Department of Orthodontics, College of Dentisrty, Yonsei University) ;
  • Chung, Chu-Ryung (Department of Orthodontics, College of Dentisrty, Yonsei University) ;
  • Hwang, Chung-Ju (Department of Orthodontics, College of Dentisrty, Yonsei University) ;
  • Cha, Jung-Yul (Department of Orthodontics, College of Dentisrty, Yonsei University)
  • 민샘 (연세대학교 치과대학병원 교정과, 두개안면기형연구소) ;
  • 정주령 (연세대학교 치과대학병원 교정과, 두개안면기형연구소) ;
  • 황충주 (연세대학교 치과대학병원 교정과, 두개안면기형연구소) ;
  • 차정열 (연세대학교 치과대학병원 교정과, 두개안면기형연구소)
  • Received : 2009.11.27
  • Accepted : 2011.05.13
  • Published : 2011.08.30
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Abstract

Nonextraction camouflage treatment in mild Class III malocclusion is achieved by backward movement of the lower dentition and forward movement of the upper dentition. Many camouflage treatment modalities have been used for distal tipping and distal movement of mandibular posterior teeth. The amount of distal movement of mandibular dentition can be improved in cases of severe crowding, even without the patient's cooperation, by using miniscrews for anchorage. However, miniscrew insertion may be unsuccessful, and it may contact the adjacent root because of the distal movement of dentition. Distal tipping of mandibular dentition can be achieved using multiloop edgewise archwires and intermaxillary elastics. However, the complexity of this wire design causes discomfort to patients. Recently, a new treatment using improved superelastic NiTi wires (ISWs) and intermaxillary elastics has been introduced. ISWs can deliver orthodontic force more effectively, and their use with molar tip-back treatment has several advantages-this approach is effective, simple, and easy to use and reduces patient discomfort. The aim of this study was to report a case of camouflage treatment using ISW with tip-back and intermaxillary elastics for distal tipping of mandibular posterior dentition and to evaluate the effectiveness of this treatment in a clinical setting.

경미한 III급 부정교합의 비발치 치료는 하악 치열의 원심이동과 상악 치열의 근심이동을 통하여 절충 치료를 하게 된다. 지금까지 하악 구치의 원심경사 및 후방이동을 시키기 위해서 다양한 치료 방법이 소개되어 왔다. 골성 고정원을 이용한 치료는 총생이 심한 경우와 같이 하악치열의 후방이동이 요구될 때 적용되는데 환자의 협조도와 무관하게 사용할 수 있지만, 하악 치열의 후방 이동 시 치근 접촉가능성이 있으며 골성 고정원의 탈락 가능성을 배제할 수 없다. Multiloop edgewise arch wire (MEAW)와 악간 고무줄을 이용한 치료는 효율적으로 하악 치아를 원심 경사할 수 있지만, 장치의 복잡성 때문에 제작이 어렵고 환자의 불편감이 증가하는 단점을 가지고 있다. 최근에 향상된 초탄성 Ni-Ti alloy wire는 교정력을 좀 더 효과적으로 전달할 수 있고, improved superelastic wire (ISW)를 이용한 tip-back은 디자인이 간단하기 때문에 간단한 조작으로 와이어를 제작할 수 있으며, 환자의 불편감이 감소할 수 있다. 본고에서는 향상된 초탄성 Ni-Ti alloy wire와 악간 고무줄을 이용하여 하악 구치부를 원심 경사이동한 증례를 소개하고, 효과적인 임상 적용을 위한 고려사항을 살펴보고자 한다.

Keywords

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