靜態穿椎弓足內固定器之剛性對腰椎受力之影響

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姓名

蕭兆閔(Chao-Min Hsiao) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

靜態穿椎弓足內固定器之剛性對腰椎受力之影響
(Effects of implant stiffness of the static transpedicular fixation on the lumbar spine)

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摘要(中)

一般來說，人們隨著年齡的增長在椎間盤裡的髓核就會開始退化，造成椎間盤的厚度減少，進而造成黃韌帶及小面關節的肥大，以致於引發壓迫到神經，造成椎間盤退化性疾病(DDD: Degenerative Disc Disease)，而解決此種症狀的方法手術中使用動態固定器與靜態固定器，恢復塌陷椎間盤之原有高度，進而解決椎間盤退化的問題。本研究為利用SolidWorks建立腰椎模型與靜態內固定器，先將腰椎模型加入肌肉群力，使分析更接近真實狀態，透過COSMOSWORKS有限元素軟體分析三種不同腰椎模型：正常腰椎、腰椎植入鈦合金靜固定器、腰椎植入316L不鏽鋼靜固定器定器三種模型來進行有限元素分析。主要模擬分析正常腰椎模型椎間盤高度與角度變化、髓核應力、椎弓足應力，所產生的應力分佈情形，將正常腰椎植入兩種靜態固定器透過有限元素分析，了解靜態內固定器對腰椎周圍醫學組織之生物力學影響。

摘要(英)

Generally,the marrow of intervertebral disk was begun degenerating by increasing age of human.This degenerating reduces the thickness of an intervertebral disk & hypertrophy of ligament & facet joint,so that it gives rise to stress the nerve and resulted in DDD. The solution for this kind of case is that we use the static fixation to recover the initial thickness of intervertebral disk by a surgical operation, so that we can solve the problem of degeneration of intervertebral disk. This research utilizes the "SolidWork" to construct the model of lumbar vertebra & static fixation.Firstly, we put the muscle force into the model of lumbar vertebra to make this analysis close to the status of reality. It analyzes three different kinds of model of lumbar vertebra via cosmosworks’’s software of limited element : the normal lumbar vertebra、the lumbar vertebra with implanting an alloy of titanium,the lumbar vertebra with implanting 316L Stainless Steel fixation,there are three kinds of model to proceed the analysis of limited element. The majorly simulation is to analyze the height,change of angle,stress of nucleus pulposus,stress of pedicle of the model of lumbar vertebra and the status of stress distribution.

關鍵字(中)

★ 腰椎
★ 髓核
★ 椎間盤
★ 小面關節
★ 有限元素分析
★ 後方骨元件
★ 韌帶
★ 脊椎內固定器

關鍵字(英)

★ lumbar
★ nucleus pulposus
★ intervertebral disc
★ face

論文目次

摘要 i
致謝文 iii
目錄 iv
表目錄 xvii
一、緒論 1
1-1 研究的動機與目的 1
1-2 腰椎之解剖生理學 3
1-2-1 腰椎運動單元簡介 4
1-2-2 腰椎周圍韌帶與肌肉群簡介 7
1-3 腰椎之病理學與手術治療方式 9
1-4 腰椎內動靜態內固定器介紹 11
1-5 文獻回顧 15
1-5-1 腰椎肌肉群之三維參數的建立 15
1-5-2 腰椎固定器之有限元素分析 22
二、材料與方法 34
2-1 三維五節腰椎之模型的建立 34
2-1-1 三維五節腰椎與椎間盤模型的建立 34
2-1-2 三維五節腰椎之韌帶建立 39
2-1-3 三維五節腰椎之肌肉群建立 42
2-2 腰椎動靜態內固定器的設計 48
2-2-1 傳統靜態內固定器的設計 48
2-3 有限元素分析 51
2-3-1 材料性質的給定 51
2-3-2 受力邊界條件的給定 53
2-3-3 接觸型式的設定 57
2-3-4 網格化與分析 60
2-4 腰椎模型有限元素分析參數與驗證 64
2-4-1 有限元素分析參數的指標 64
2-4-2 自然腰椎模型的驗證 66
三、結果 69
3-1 椎間盤角度與高度變化 69
3-2 椎間盤髓核應力變化 74
3-3 椎弓足的應力變化 77
3-4 內固定器的應力變化 80
3-4-1 鈦合金椎弓釘與連接桿應力變化 80
3-4-2 316L椎弓釘與連接桿應力變化 91
四、討論 102
4-1 椎間盤角度與高度變化討論 102
4-2 椎間盤之隨核應力變化討論 104
4-3 椎弓足的應力變化討論 107
4-4 內固定器的應力變化討論 111
五、未來展望 124
5-1 結論 124
5-2 未來展望 125

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指導教授

林上智(Shang-Chih Lin)

審核日期

2009-7-13

推文