Finite-element analysis of the shift in center of resistance of the maxillary dentition in relation to alveolar bone loss.
10.4041/kjod.2009.39.5.278
- Author:
Sang Jin SUNG
1
;
In Tai KIM
;
Yoon Ah KOOK
;
Youn Sic CHUN
;
Seong Hun KIM
;
Sung Seo MO
Author Information
1. Department of Orthodontics, University of Ulsan College of Medicine, Asan Medical Center, Korea.
- Publication Type:Original Article
- Keywords:
Finite element analysis;
Center of resistance;
Alveolar bone loss;
Maxillary full dentition
- MeSH:
Alveolar Bone Loss;
Dentition;
Finite Element Analysis;
Incisor;
Periodontal Ligament;
Splints;
Tooth
- From:Korean Journal of Orthodontics
2009;39(5):278-288
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVE: The aim of this study was to investigate the changes in the center of resistance of the maxillary teeth in relation to alveolar bone loss. METHODS: A finite element model, which included the upper dentition and periodontal ligament, was designed according to the amount of bone loss (0 mm, 2 mm, 4 mm). The teeth in each group were fixed with buccal and lingual arch wires and splint wires. Retraction and intrusion forces of 200 g for 4 and 6 anterior teeth groups and 400 g for the full dentition group were applied. RESULTS: The centers of resistance were at 13.5 mm, 14.5 mm, 15 mm apical and 12 mm, 12 mm, 12.5 mm posterior in the 4 incisor group; 13.5 mm, 14.5 mm, 15 mm apical and 14 mm, 14 mm, 14.5 mm posterior in the 6 anterior teeth group; and 11 mm, 13 mm, 14.5 mm apical and 26.5 mm, 27 mm, 25.5 mm posterior in the full dentition group respectively according to 0 mm, 2 mm, 4 mm bone loss. CONCLUSIONS: The center of resistance shifted apically and posteriorly as alveolar bone loss increased in 4 and 6 anterior teeth groups. However, in the full dentition group, the center of resistance shifted apically and anteriorly in the 4 mm bone loss model.
