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Distalization pattern of whole maxillary dentition according to force application points

 Eui Hyang Sung  ;  Sung Jin Kim  ;  Youn Sic Chun  ;  Young Chel Park  ;  Hyung Seog Yu  ;  Kee Joon Lee 
 KOREAN JOURNAL OF ORTHODONTICS, Vol.45(1) : 20-28, 2015 
Journal Title
Issue Date
Displacement ; Distalization ; Entire arch ; Finite element ; Occlusal plane
OBJECTIVE: The purpose of this study was to observe stress distribution and displacement patterns of the entire maxillary arch with regard to distalizing force vectors applied from interdental miniscrews.
METHODS: A standard three-dimensional finite element model was constructed to simulate the maxillary teeth, periodontal ligament, and alveolar process. The displacement of each tooth was calculated on x, y, and z axes, and the von Mises stress distribution was visualized using color-coded scales.
RESULTS: A single distalizing force at the archwire level induced lingual inclination of the anterior segment, and slight intrusive distal tipping of the posterior segment. In contrast, force at the high level of the retraction hook resulted in lingual root movement of the anterior segment, and extrusive distal translation of the posterior segment. As the force application point was located posteriorly along the archwire, the likelihood of extrusive lingual inclination of the anterior segment increased, and the vertical component of the force led to intrusion and buccal tipping of the posterior segment. Rotation of the occlusal plane was dependent on the relationship between the line of force and the possible center of resistance of the entire arch.
CONCLUSIONS: Displacement of the entire arch may be dictated by a direct relationship between the center of resistance of the whole arch and the line of action generated between the miniscrews and force application points at the archwire, which makes the total arch movement highly predictable.
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2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Others (기타) > 1. Journal Papers
Yonsei Authors
Kim, Sung Jin(김성진) ORCID logo https://orcid.org/0000-0003-4115-0403
Park, Young Chel(박영철)
Yu, Hyung Seog(유형석) ORCID logo https://orcid.org/0000-0002-1275-5078
Lee, Kee Joon(이기준) ORCID logo https://orcid.org/0000-0002-0782-3128
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