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A three dimensional finite element analysis on en-masse retraction of maxillary anterior teeth by rocking-chair archwire in sliding mechanics.
- Source :
- West China Journal of Stomatology; Feb2013, Vol. 31 Issue 1, p21-25, 5p, 1 Color Photograph, 1 Black and White Photograph, 1 Diagram, 2 Charts, 4 Graphs
- Publication Year :
- 2013
-
Abstract
- Objective To investigate the effect of en-masse retraction of maxillary anterior teeth by rocking-chair archwire (RCA) in sliding mechanics. Methods The three dimensional finite element model of maxillary teeth was created based on spiral CT data of a patient by ANSYS software. The forces on each tooth and the torques on the six center of resistance (CR) of the anterior teeth induced by the deformation of RCA with different depth and anterior retraction hook (ARH) with different height were calculated when retracted from a mini-implant between the first molar and the second premolar. The movements of anterior teeth were observed eonthining different depth of RCA with different height of ARH. Results The clockwise torque in sliding mechanics to realize en-masse retraction of the anterior teeth could be counterbalanced by RCA of certain depth. The combination of 7.2 mm ARH and 2 mm RCA can be used to intrude and retract maxillary anterior teeth under the condition of applying mini-implant. Conclusion The excessive retraction that usually exists in traditional treatments can be avoided by RCA in sliding mechanics and intrusion and torque control during anterior segment retraction can also be achieved by this method. [ABSTRACT FROM AUTHOR]
- Subjects :
- INCISORS
MOLARS
BICUSPIDS
TORQUE
TORQUE control
THREE-dimensional display systems
Subjects
Details
- Language :
- Chinese
- ISSN :
- 10001182
- Volume :
- 31
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- West China Journal of Stomatology
- Publication Type :
- Academic Journal
- Accession number :
- 85945575
- Full Text :
- https://doi.org/10.7518/hxkq.2013.01.006