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KMID : 0361920170470050289
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Korean Journal of Orthodontics
2017 Volume.47 No. 5 p.289 ~ p.297
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Biomechanical analysis of distalization of mandibular molars by placing a mini-plate: A finite element study
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Park Myung-Soon
Na Yong-Hyun
Park Min-Bong
Ahn Jang-Hoon
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Abstract
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Objective: The objective of this study was to analyze the patterns of toothmovements when distalization of mandibular molars using a mini-plate tookplace. A finite element analysis was applied to analyze patterns of toothmovements.
Methods: The model of the mandible and teeth were used to builda finite element analysis model, and a mini-plate was inserted in the mandibular ramus. Two different orthodontic forces were established for displacement of mandibular molars. Orthodontic forces were applied at the level of the bracket and at the level of the cemento-enamel junction in the mandibular canine respectively.
Results: Applying orthodontic forces at the level of the cementoenamel junction resulted in a greater biomechanical bodily movement in distalization of the mandibular molars compared to when the orthodontic forces were applied at the level of the bracket. Applying orthodontic forces to the cemento-enamel junction also resulted in unwanted greater extrusive movements in distalization of the mandibular molars compared to the bracket level.
Conclusions: With considering the mode of orthodontic teeth movement, applying different vertical orthodontic forces for distalization of mandibular molars can lead to more effective distalization of teeth.
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KEYWORD
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Finite element analysis, Distalization, Mandibular molars, Mini-plate
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