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研究生(外文):Yu-hsing Sung
論文名稱(外文):Deformation of Periodontal Ligament Under Loading
指導教授(外文):Ting-Sheng LinChih-Han Chang
外文關鍵詞:MicroCTFinite element analysisPeriodontal ligament
  • 被引用被引用:3
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牙周膜韌帶(Periodontal ligament,PDL)是連接牙齒與齒槽骨之間的纖維結締組織,其具有支持牙齒,傳遞、吸收和分散咬合力之功能,於牙科生物力學領域中扮演著重要角色。然而,由於其幾何形狀複雜和牙周膜韌帶試片製備困難,致使牙周膜韌帶之力學性質尚未得到明確之定義。因此,本研究結合了高解析度電腦斷層掃瞄(MicroCT,µCT)實驗與有限元素分析,探討牙周膜韌帶於牙齒受力時之生物力學行為。
Periodontal ligament (PDL) is a fibrous connective tissue that anchors the tooth to the bone of the jaw. The functions of the PDL are to support the tooth in the bone and resist the impact of occlusal forces during mastication, which are important in dental biomechanics. Although many studies have been employed to investigate the biomechanical responses of the PDL, large variations existed due to its complicated natural and difficulty in specimen preparation. The mechanical property of the PDL remains unclear. The objective of this study was to examine the mechanical property of the PDL in-vitro according to the comparison between the microCT experiments and finite element analysis.
This study developed a custom-made in-vitro testing apparatus for measuring force and displacement of the porcine PDL specimen within microCT. Furthermore, synchronized CT images were taken to obtain the deformation of entire specimen and to reconstruct the 3D finite element model. Finite element analysis was then applied to simulate the biomechanical response of the PDL to match the experiment results. The experimental results indicate that the PDL has nonlinear and viscoelastic characteristics. Using hyperelastic material model in FEA might mimic the biomechanical response of the PDL. As the result, it is a novel method to investigate the biomechanical property of the PDL under loading by integration of in-vitro experiment in µCT and FEA and which could be adopted for future studies.
Keywords: Periodontal ligament, Finite element analysis, MicroCT
中文摘要 I
Abstract II
誌謝 IV
目錄 V
表目錄 VII
圖目錄 VIII
第1章 緒論 1
1-1 前言 1
1-2 牙周膜韌帶之組成與功能簡介 3
1-3 相關文獻回顧 7
1-3-1 牙周膜韌帶受力機制 7
1-3-2 牙周膜韌帶相關實驗 11
1-3-3 有限元素模擬分析之相關文獻 17
1-4 高解析度電腦掃描儀 19
1-4-1 高解析度電腦掃描儀原理 19
1-5 研究動機與目的 21
第2章 材料與方法 22
2-1 研究流程概述 22
2-2 實驗量具之設計 24
2-3 實驗流程與設計 26
2-4 影像處理及分析 29
2-4-1 µCT掃瞄 31
2-4-2 牙齒與牙周膜韌帶之位移分析 35
2-5 Finite Element Model & Analysis 39
2-5-1 3D有限元素模型之重建 39
2-5-2 3D有限元素模型之材料性質 45
2-5-3 負荷與邊界條件 46
第3章 結果與討論 47
3-1 拉伸實驗 47
3-2 影像處理及分析 54
3-2-1 µCT掃瞄與影像重組 54
3-2-2 牙齒與牙周膜韌帶之位移分析 57
3-2-3 實驗限制 71
3-2-4 3D有限元素模擬分析 73
第4章 結論 78
參考文獻 80
附錄 85
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