Comparison of the skeletal and dental changes of tooth-borne vs. bone-borne expansion devices in surgically assisted rapid palatal expansion: A finite element study
Background: The aim of this study was to compare the skeletal and dental changes of a tooth-borne (Hyrax) and a bone-borne (Smile distractor) expansion devices using three-dimensional model of a human skull. Materials and Methods: A finite element model of human skull was generated using data from 3...
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| Main Authors: | , , , |
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| Format: | Book |
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Wolters Kluwer Medknow Publications,
2013-01-01T00:00:00Z.
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| Summary: | Background: The aim of this study was to compare the skeletal and dental changes of a tooth-borne (Hyrax) and a bone-borne (Smile distractor) expansion devices using three-dimensional model of a human skull. Materials and Methods: A finite element model of human skull was generated using data from 3-D CT scans of an 11-year-old female child. Then a Hyrax expander (tooth-borne appliance) and Smile distractor (bone-borne appliance) in three different positions were adapted to the finite element model and expanded for 0.5 mm simulating the clinical situation. The 3-D pattern of displacement and stress distribution was then analyzed. Results: The results of this study showed that screw position affects the stress and displacement pattern within the nasomaxillary complex and maxillary dental arch. Conclusion: Closer teeth feel more stress and undergo more displacement than the farther ones. Moreover, skeletal effects of the Smile distractor were greater than of Hyrax in all different positions. |
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| Item Description: | 1735-3327 2008-0255 10.4103/1735-3327.122477 |