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KMID : 1004520140300040265
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Journal of Dental Rehabilitation and Applied Science
2014 Volume.30 No. 4 p.265 ~ p.277
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3-dimensional finite element analysis of maxillary molar distalization using R-jig with TADs
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Tark Myung-Hyun
Lee Keun-Young
Cho Jin-Woo
Chee Young-Deok
Cho Jin-Hyoung
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Abstract
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Purpose: The purpose of this study was to investigate the differences of displacement pattern depending on type of sliding jig and application method during maxillary molar distalization with temporary anchorage devices (TADs).
Materials and Methods: Maxilla with normal tooth size and arch shape was selected to create a 3-dimensional finite element model, which included the bracket, orthodontic main archwire, removable sliding jig (R-jig). The orthodontic mini-implant anchorage was set 8 mm superiorly from main archwire, buccally between the second premolar and first molar. The base experimental design was Condition 1, which was composed 0.019 × 0.025 inch stainless steel (SS) of wire size of R-jig, 200 gm force, un-tied state. And the other designs varied to wire size of R-jig, magnitude of force. The results are as follows.
Results: As the wire size of R-jig was increased, the deformation of R-jig was decreased. However, the displacement of second molar wasn’t different each other. As the force to second molar was increased, the more displacement of second molar was observed, and the more distal tipping movement, vetical displacement was observed.
Conclusion: R-jig can get distal teeth movement in orthodontic treatment without side effects.
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KEYWORD
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R-jig, mini-implant, finite element analysis, molar distalization
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