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博士論文 / Development of a numerical simulation model for long-term orthodontic tooth movement with contact boundary conditions using the finite element method 矯正力による長期的な歯の移動シミュレーションモデルの開発―接触問題を含めた有限要素法による解析―

著者

書誌事項

タイトル

Development of a numerical simulation model for long-term orthodontic tooth movement with contact boundary conditions using the finite element method

タイトル別名

矯正力による長期的な歯の移動シミュレーションモデルの開発―接触問題を含めた有限要素法による解析―

著者名

濵中僚

学位授与大学

Nagasaki University (長崎大学) (大学ID:0073) (CAT機関ID:KI000877)

取得学位

博士(医学)

学位授与番号

甲医歯薬第978号

学位授与年月日

2017-06-07

注記・抄録

Introduction: Although many attempts have been made to simulate orthodontic tooth movement using the finite element method, most were limited to analyses of the initial displacement in the periodontal ligament and were insufficient to evaluate the effect of orthodontic appliances on long-term tooth movement. Numeric simulation of long-term tooth movement was performed in some studies; however, neither the play between the brackets and archwire nor the interproximal contact forces were considered. The objectives of this study were to simulate longterm orthodontic tooth movement with the edgewise appliance by incorporating those contact conditions into the finite element model and to determine the force system when the space is closed with sliding mechanics. Methods: We constructed a 3-dimensional model of maxillary dentition with 0.022-in brackets and 0.019 × 0.025-in archwire. Forces of 100 cN simulating sliding mechanics were applied. The simulation wasaccomplished on the assumption that bone remodeling correlates with the initial tooth displacement. Results: This method could successfully represent the changes in the moment-to-force ratio: the tooth movementpattern during space closure. Conclusions: We developed a novel method that could simulate the long-term orthodontic tooth movement and accurately determine the force system in the course of time by incorporating contact boundary conditions into finite element analysis. It was also suggested that friction is progressively increased during space closure in sliding mechanics.

開始ページ : 601

終了ページ : 612

元資料の権利情報 : © 2017. Published by Elsevier Inc.

Introduction: Although many attempts have been made to simulate orthodontic tooth movement using the finite element method, most were limited to analyses of the initial displacement in the periodontal ligament and were insufficient to evaluate the effect of orthodontic appliances on long-term tooth movement. Numeric simulation of long-term tooth movement was performed in some studies; however, neither the play between the brackets and archwire nor the interproximal contact forces were considered. The objectives of this study were to simulate longterm orthodontic tooth movement with the edgewise appliance by incorporating those contact conditions into the finite element model and to determine the force system when the space is closed with sliding mechanics. Methods: We constructed a 3-dimensional model of maxillary dentition with 0.022-in brackets and 0.019 × 0.025-in archwire. Forces of 100 cN simulating sliding mechanics were applied. The simulation was

accomplished on the assumption that bone remodeling correlates with the initial tooth displacement. Results: This method could successfully represent the changes in the moment-to-force ratio: the tooth movement

pattern during space closure. Conclusions: We developed a novel method that could simulate the long-term orthodontic tooth movement and accurately determine the force system in the course of time by incorporating contact boundary conditions into finite element analysis. It was also suggested that friction is progressively increased during space closure in sliding mechanics.

各種コード

NII論文ID(NAID)

500001051328

NII著者ID(NRID)
  • 8000001135182
DOI (出版社)

10.1016/j.ajodo.2017.03.021

DOI

info:doi/10.1016/j.ajodo.2017.03.021

本文言語コード

eng

データ提供元

機関リポジトリ / NDLデジタルコレクション

DOI

博士論文 / 長崎大学 / 医学

博士論文 / 長崎大学

博士論文 / 医学

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