Does the center of resistance depend on the direction of tooth movement?
- PMID: 20197172
- DOI: 10.1016/j.ajodo.2008.03.029
Does the center of resistance depend on the direction of tooth movement?
Abstract
Introduction: The objective of this study was to compare the locations of the centers of resistance (CRes) in the buccolingual (BL) and mesiodistal (MD) directions of the mandibular central incisors of 6 dogs.
Methods: Based on microcomputed tomography images of the teeth and their supporting tissues, solid models were used to build finite element models.
Results: The CRes locations for the 6 specimens were determined for displacements in the BL and MD directions with finite element calculations. Measured from the alveolar crest, the BL and MD locations were 43% to 51% and 31% to 43% of root length, respectively. Their average locations, 46.2% and 38.3%, were statistically different at the 95% CI.
Conclusions: The CRes location for BL tooth movement is significantly more apical than its MD counterpart.
2010 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.
Comment in
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The center and axis of tooth movement.Am J Orthod Dentofacial Orthop. 2010 Jun;137(6):723-4; author reply 724. doi: 10.1016/j.ajodo.2010.04.010. Am J Orthod Dentofacial Orthop. 2010. PMID: 20685512 No abstract available.
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