대한치과교정학회지 (The korean journal of orthodontics)

  • 제48권3호
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  • Pages.189-199
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  • 2018
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  • 2234-7518(pISSN)
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  • 2005-372X(eISSN)
대한치과교정학회 (The Korean Association Of Orthodontists)
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Cone-beam computed tomography-based diagnosis and treatment simulation for a patient with a protrusive profile and a gummy smile

  • Uesugi, Shunsuke (Department of Orthodontic Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University) ;
  • Imamura, Toshihiro (Department of Orthodontic Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University) ;
  • Kokai, Satoshi (Department of Orthodontic Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University) ;
  • Ono, Takashi (Department of Orthodontic Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University)
  • 투고 : 2017.09.14
  • 심사 : 2017.11.13
  • 발행 : 2018.05.25
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초록

For patients with bimaxillary protrusion, significant retraction and intrusion of the anterior teeth are sometimes essential to improve the facial profile. However, severe root resorption of the maxillary incisors occasionally occurs after treatment because of various factors. For instance, it has been reported that approximation or invasion of the incisive canal by the anterior tooth roots during retraction may cause apical root damage. Thus, determination of the position of the maxillary incisors is key for orthodontic diagnosis and treatment planning in such cases. Cone-beam computed tomography (CBCT) may be useful for simulating the post-treatment position of the maxillary incisors and surrounding structures in order to ensure safe teeth movement. Here, we present a case of Class II malocclusion with bimaxillary protrusion, wherein apical root damage due to treatment was minimized by pretreatment evaluation of the anatomical structures and simulation of the maxillary central incisor movement using CBCT. Considerable retraction and intrusion of the maxillary incisors, which resulted in a significant improvement in the facial profile and smile, were achieved without severe root resorption. Our findings suggest that CBCT-based diagnosis and treatment simulation may facilitate safe and dynamic orthodontic tooth movement, particularly in patients requiring maximum anterior tooth retraction.

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참고문헌

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피인용 문헌

  1. The Shape of Nasopalatine Canal as a Determining Factor in Therapeutic Approach for Orthodontic Teeth Movement-A CBCT Study vol.11, pp.12, 2018, https://doi.org/10.3390/diagnostics11122345
  2. Incisor position and alveolar bone thickness: vol.92, pp.1, 2022, https://doi.org/10.2319/022320-122.1