Distalization pattern of whole maxillary dentition according to force application points.
10.4041/kjod.2015.45.1.20
- Author:
Eui Hyang SUNG
1
;
Sung Jin KIM
;
Youn Sic CHUN
;
Young Chel PARK
;
Hyung Seog YU
;
Kee Joon LEE
Author Information
1. Department of Orthodontics, School of Dentistry, Yonsei University, Seoul, Korea. orthojn@yuhs.ac
- Publication Type:Original Article
- Keywords:
Distalization;
Entire arch;
Finite element;
Occlusal plane;
Displacement
- MeSH:
Alveolar Process;
Dental Occlusion;
Dentition*;
Periodontal Ligament;
Tooth;
Weights and Measures
- From:The Korean Journal of Orthodontics
2015;45(1):20-28
- CountryRepublic of Korea
- Language:English
-
Abstract:
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.
