論文

査読有り 国際誌
2020年8月13日

Effect of Magnet Position on Tipping and Bodily Tooth Movement in Magnetic Force-Driven Orthodontics.

Materials (Basel, Switzerland)
  • Yoshiki Ishida
  • ,
  • Yukinori Kuwajima
  • ,
  • Cliff Lee
  • ,
  • Kaho Ogawa
  • ,
  • John D Da Silva
  • ,
  • Shigemi Ishikawa-Nagai

13
16
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.3390/ma13163588

The goal of our study is to launch magnetic force-driven orthodontics. This continuous study investigated the influence of magnet position on tipping and bodily tooth movement, using 3D printing technology and digital analysis. Orthodontic typodont models (TMs) for space-closure were 3D printed to mimic maxillary central incisors. Nd-Fe-B magnets were placed in the middle third (Model-M), and the cervical third (Model-C), of the tooth. TMs, before and after movement, were digitally scanned and superimposed. The 3D digital coordinates (X, Y, and Z axes), and rotations (yaw, pitch, and roll) of the tooth crown and root, were calculated and compared between the two magnet position settings. Model-M showed higher rates of movement, but more rotation than Model-C (p < 0.01). The root apex of Model-M moved in the opposite direction of the crown (R = -0.29), indicating tipping movement. In contrast, the crown and root apex moved in the same direction (R = 0.56) in Model-C, indicating bodily movement. These patterns were confirmed in a typodont model of a moderate crowding case. The results validated that modifying the magnet position increased the amount of bodily tooth movement, and decreased rotation/tipping in an ex vivo setting.

リンク情報
DOI
https://doi.org/10.3390/ma13163588
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/32823770
PubMed Central
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7475987
ID情報
  • DOI : 10.3390/ma13163588
  • PubMed ID : 32823770
  • PubMed Central 記事ID : PMC7475987

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