The Journal of the Korean dental association (대한치과의사협회지)

The Korean Dental Association (대한치과의사협회)
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Digital fabrication and application of clear aligner after alignment with NiTi archwires

NiTi 호선을 이용한 초기 배열 후 디지털 방식 투명교정장치의 적용

  • Lim, Sung-Hoon (Department of Orthodontics, School of Dentistry, Chosun University)
  • 임성훈 (조선대학교 치과대학 치과교정학교실)
  • Received : 2016.06.13
  • Accepted : 2016.06.17
  • Published : 2016.07.01
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Abstract

There are interferences between the teeth to be moved and the clear aligner made from setup. These interferences generate forces which move teeth to the desired position. However, these can cause incomplete tooth capture of clear aligner. When these interferences exceed the acceptable deformation of aligner, unwanted intrusion of teeth to be moved occurs. When correction of rotation or tipping of teeth is attempted, intrusion prevails before rotation or tipping. However, clear aligner can induce labiolingual tipping or intrusion easily. To achieve preliminary alignment including control of rotation and tipping, NiTi archwires with fixed appliance can be used first, and then clear aligner can be used for finishing in mild Class I maloccusion cases. For this purpose, clear aligner can be made using a digital setup and 3D printing. To move teeth using a clear aligner, tooth capture is critical. To improve tooth capture of clear aligners, slingshot or vertical elastics can be used. These were discussed with illustrations.

경미한 I급 부정교합의 경우, 회전 및 경사 조절은 먼저 NiTi 호선을 사용하여 달성한 후, 순설 이동 및 약간의 수직 조절은 투명교정장치로 이루는 방법을 선택할 수 있다. 이때 tooth capture가 잘 안 되는 부위에서는 slingshot 또는 수직 고무줄을 사용하여 보완할 수 있다.

Keywords

Acknowledgement

Supported by : Chosun University Dental Hospital

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