並列タイトル等歯槽骨に及ぼすテンポラリーアンカレッジデバイス（スクリュータイプ）を用いた牽引力の影響 ―三次元有限要素法による力学解析―
一般注記We used the three-dimensional finite element method to construct a three-dimensional model of the maxilla to evaluate the utility of the temporary anchorage device (TAD), and to investigate stress changes affecting the alveolar bone after the extraction of the first premolar. An outline of the model was fabricated from CT image data with the contours following extraction using the stress analysis software Mechanical Finder version 6.2 (Research Center of Computational Mechanics, Tokyo, Japan), followed by the construction of a three- dimensional maxillary model and fabrication of an extracted maxillary first premolar model. Four chronological models, immediately after tooth extraction, and after 1, 3, and 6 months, were fabricated by changing the CT values of the extracted area based on this model. A TAD was constructed in the mesial area of the upper first molar using SolidWorks software (Solid-Works, Tokyo, Japan). The upper first molar was constrained, and the upper canine was pulled in a distal direction towards the TAD at 1 N to analyze stress changes affecting the alveolar bone in the region of the extracted tooth. Stress affecting the alveolar bone in the extracted region peaked immediately after tooth extraction, and gradually decreased with time. On the other hand, stress concentration was observed in the mesial alveolar crest of the extraction socket and the stress increased with ossification of the extraction socket. These results suggest that when using TAD it is more beneficial to apply tractive force soon after tooth extraction for distal tooth movement.
2014年度
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受理日（W3CDTF）2022-02-06T04:33:19+09:00
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