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Approximation and contact of the maxillary central incisor roots with the incisive canal after maximum retraction with temporary anchorage devices: Report of 2 patients

Authors
 Chooryung J. Chung  ;  Yoon Jeong Choi  ;  Kyung-Ho Kim 
Citation
 AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS, Vol.148(3) : 493-502, 2015 
Journal Title
 AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS 
ISSN
 0889-5406 
Issue Date
2015
MeSH
Bicuspid/surgery ; Cone-Beam Computed Tomography/methods ; Dental Alloys/chemistry ; Elastomers/chemistry ; Female ; Follow-Up Studies ; Humans ; Imaging, Three-Dimensional/methods ; Incisor/diagnostic imaging* ; Malocclusion, Angle Class II/diagnostic imaging ; Malocclusion, Angle Class II/therapy ; Maxilla/diagnostic imaging* ; Middle Aged ; Nickel/chemistry ; Orthodontic Anchorage Procedures/instrumentation* ; Orthodontic Appliance Design ; Orthodontic Space Closure/instrumentation ; Root Resorption/diagnostic imaging ; Titanium/chemistry ; Tooth Movement Techniques/instrumentation* ; Tooth Movement Techniques/methods ; Tooth Root/diagnostic imaging* ; Young Adult
Abstract
The incisive canal is located on the median plane of the maxilla, posterior to the roots of the central incisor. Although the incisive canal is not considered an anatomic structure that may limit tooth movement, it has recently gained attention regarding the possibilities of surgical invasion and associated complications because of its proximity to the maxillary central incisors. In the 2 illustrated cases, lip protrusion was improved by en-masse bodily retraction of the anterior teeth (>8 mm) using temporary anchorage devices. Three-dimensional cone-beam computed tomography showed that the maxillary incisor roots were approximated to the incisive canal after maximum retraction. One central incisor root was in direct contact with the incisive canal with severe root resorption, but tooth vitality and the overall occlusion were stable in the long term without any sensory dysfunction. The apparent root resorption may be mainly related to the large amounts of anterior retraction and root movement in the 2 patients. However, the anatomic location of the incisive canal and the possibilities of its invasion after tooth movement should be closely monitored when maximum retraction is planned, to prevent potential complications.
Full Text
http://www.sciencedirect.com/science/article/pii/S0889540615007441
DOI
10.1016/j.ajodo.2015.04.033
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
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
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/141046
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