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研究生:宋宇興
研究生(外文):Yu-hsing Sung
論文名稱:牙周膜韌帶受力變形分析
論文名稱(外文):Deformation of Periodontal Ligament Under Loading
指導教授:林鼎勝林鼎勝引用關係張志涵張志涵引用關係
指導教授(外文):Ting-Sheng LinChih-Han Chang
學位類別:碩士
校院名稱:國立成功大學
系所名稱:醫學工程研究所碩博士班
學門:工程學門
學類:綜合工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:85
中文關鍵詞:有限元素模擬高解析度電腦斷層掃瞄牙周膜韌帶
外文關鍵詞:MicroCTFinite element analysisPeriodontal ligament
相關次數:
  • 被引用被引用:3
  • 點閱點閱:268
  • 評分評分:
  • 下載下載:29
  • 收藏至我的研究室書目清單書目收藏:0
中文摘要
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。
本研究利用豬牙齒試件,包括牙齒-牙周膜韌帶-齒槽骨,以自行設計之夾置具與量測系統架放於高解析度電腦斷層掃瞄(MicroCT,µCT)同步進行拉伸試驗,再經由影像處理觀察牙齒與牙周膜韌帶之整體位移及變形情形,並重建三維有限元素牙齒網格模型,藉由實驗資料加以反推牙周膜韌帶之材料力學性質。
由實驗結果顯示牙周膜韌帶具有非線性且黏彈性之力學性質,同時將牙周膜韌帶假設為超彈性材料之力學性質,能準確地模擬出與實驗相近之結果。本研究將力學實驗、µCT與有限元素模擬結合,探討牙周膜韌帶於牙齒受力時之生物力學反應,期望所建立之實驗與分析模式能提供後續相關研究之參考。
關鍵詞:牙周膜韌帶、有限元素模擬、高解析度電腦斷層掃瞄
Abstract
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
目錄
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
參考文獻
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