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A 15-year follow up of an orthodontic treatment including a lower incisor extraction and keeping the maxillary canine-premolar transposition

Authors
 Soonshin Hwang  ;  Insil Kim  ;  Woowon Jang  ;  Yoon Jeong Choi  ;  Chooryung J. Chung  ;  Kyung-Ho Kim 
Citation
 Angle Orthodontist, Vol.89(5) : 812-826, 2019 
Journal Title
 Angle Orthodontist 
ISSN
 0003-3219 
Issue Date
2019
Keywords
Incisor extraction ; Long term ; Relapse ; Retention ; Transposition
Abstract
Lower incisor extraction is an effective option for treating lower anterior crowding in patients with a good facial profile, Class I molar occlusion, and narrow upper incisors. This report describes the successful treatment of an adolescent patient with lower anterior crowding and a transposed maxillary canine and premolar treated by extracting a lower incisor and keeping the transposed positions of the teeth. With the use of retainers, treatment results were stable up to the 2-year postretention visit. However, upon a 15-year postretention appointment, the fixed retainer had been removed and the removable retainer was no longer in use, which resulted in relapse of lower anterior alignment. Moreover, the transposed canine had extruded during this period, causing occlusal interference and gingival recession, as well as loss of tooth vitality, which indicates the importance of maintaining orthodontic retainers for long-term stable occlusion.
Full Text
https://www.angle.org/doi/10.2319/020118-93.1
DOI
10.2319/020118-93.1
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kyung Ho(김경호) ORCID logo https://orcid.org/0000-0002-8154-2041
Jang, Woowon(장우원)
Chung, Chooryung J.(정주령) ORCID logo https://orcid.org/0000-0001-9399-7193
Choi, Yoon Jeong(최윤정) ORCID logo https://orcid.org/0000-0003-0781-8836
Hwang, Soon Shin(황순신) ORCID logo https://orcid.org/0000-0002-6472-4732
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/171257
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