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http://dx.doi.org/10.4041/kjod.2011.41.4.237

Three dimensional finite element analysis of continuous and segmented arches with use of orthodontic miniscrews  

Lee, Eon-Hwa (Department of Dentistry, College of Medicine, Inha University)
Yu, Hyung-Seog (Department of Orthodontics, College of Dentisrty, Yonsei University)
Lee, Kee-Joon (Department of Orthodontics, College of Dentisrty, Yonsei University)
Park, Young-Chel (Department of Orthodontics, College of Dentisrty, Yonsei University)
Publication Information
The korean journal of orthodontics / v.41, no.4, 2011 , pp. 237-254 More about this Journal
Abstract
Objective: The purpose of this study was to compare the displacement patterns shown by finite element analysis when the maxillary anterior segment was retracted from different orthodontic miniscrew positions and different lengths of lever arms in lingual continuous and segmented arch techniques. Methods: A three dimensional model was produced, the translation of teeth in both models was measured and individual displacement was calculated. Results: When traction was carried out from miniscrews in the palatal slope, lingual tipping of crowns and extrusion of the maxillary anterior segment were found in both continuous and segmented arches as the lever arms were made shorter. With miniscrews in the midpalatal suture area, the displacement patterns were similar to the palatal slope, but bodily movement of the upper incisors was observed in both continuous and segmented arches with the lever arm at 20 mm. When lever arms were longer, there was less extrusion of the incisors and more buccal displacement of the canines. Such displacement was shown less in the continuous arch than the segmented arch. The second premolar showed crown mesial tipping and intrusion, and the molars showed distal tipping in the continuous arch. The posterior segment was displaced three dimensionally in the segmented arch, but the amount of displacement was less than the continuous arch. Conclusions: It is recommended that lever arms of 20 mm in length be used for bodily movement of the anterior segment. Use of continuous or segmented arches affect the displacement patterns and induce differences in the amount of displacement.
Keywords
Finite element analysis; Lever arm; Continuous arch; Segmented arch;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
Times Cited By Web Of Science : 1  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
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