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研究生:謝誌宇
研究生(外文):Chih-Yu Hsieh
論文名稱:不同鞋面形態之女性高跟鞋對拇趾外翻成因的探討
論文名稱(外文):'Formation of Hallux Valgus on Different Shoe Upper Designs of High-heeled Ladies' Shoes
指導教授:楊世偉楊世偉引用關係
指導教授(外文):Sai-Wei Yang
學位類別:碩士
校院名稱:國立陽明大學
系所名稱:醫學工程研究所
學門:工程學門
學類:生醫工程學類
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:79
中文關鍵詞:高跟鞋拇外翻楦頭寬度動態有限元素分析
外文關鍵詞:high heel shoeshallux valgustoe last typedynamic finite element
相關次數:
  • 被引用被引用:4
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  • 收藏至我的研究室書目清單書目收藏:3
近年來高跟尖頭鞋又漸漸地流行,許多愛美的女性朋友為了追求時尚,往往將腳板硬塞進窄窄的鞋頭,長久不當的擠壓加上穿高跟鞋行走時讓前足增加額外的負擔,因此,高跟尖頭鞋很容易造成足部疼痛及骨頭結構異常,進而帶來了常見的併發症-拇指外翻。
本研究利用有限元素法探討女性在穿著不同鞋頭寬度的高跟鞋(高跟涼鞋與包趾高跟鞋),觀察站立期時腳拇趾內骨頭間受力,探討拇外翻形成,並做實驗加以驗證。首先使用實驗室現有男性足部模型,比對女性x光片的尺寸對於各腳骨做修改,並加入軟骨、韌帶、足底筋膜與軟組織,將實體模型網格化成為三維正常有限元素足部模型,根據文獻給定材料參數,並加上實驗所得邊界條件與負荷,藉由改變鞋頭寬度,觀察足內骨骼間受力 。
結果顯示在模擬步態中足跟著地至足底平貼期之間,趾骨區所受鞋面、鞋帶之應力值約1~2Mpa。在0.12秒足底平貼期之後,在第一趾骨上受到5Mpa的von Mises stress; 但此時前足拘束的不同而受力程度也不同,由於鞋跟高度使人重心向前偏移,足部也向前擠壓,以正向應力來看,作用在近端第一趾骨上向外側的力,高跟涼鞋之寬度71mm甚至較81mm高三倍以上。
顯示在改變足寬之後,使近端第一趾骨向外變形的力量增加,超過一般穿著高跟涼鞋所受之正向應力3倍以上,若長期受到此力作用可能導致拇趾外翻的發生。
Today, high-heels are typically worn by women. High-heeled shoes slant the foot forward and down while bending the toes up. When the foot slants forward, a much greater weight is transferred to the forefoot, increasing the likelihood of damage. In many high heel shoes tip the foot forward are compressing the toes, or forcing them together, possibly resulting in hallux valgus and many other medical conditions, most of which are permanent, and will require surgery to alleviate the pain. The objective of this study is thus to use a 3D FE model of the female foot and ankle together with a high-heeled support to investigate bony force during the mid-stance to push-off position. And the effect of toe last width and heel height with hallux valgus.
The foot model in this research was edit from a 24 years of male foot model. Current model is a contrast with a 23 years female x-ray photo. The developed FE model consisted of 28 distinct bony segments, cartilage, ligament, plantar fascia. The mechanical properties of the foot bones and soft tissues were assigned reference and boundary conditions by experiment.
For forefoot contacted ground, it induced 5 Mpa on hallux similar the scholar. Because of heel height, the foot slide forward and induced a peak stress 59 Mpa when wearing width 71 mm sandal shoe and 80 Mpa with last shoes. The principle stress on hallux was 11.7 Mpa with width 71 mm sandal shoe, the stress of the width 77mm wass more than three times the sandal shoes of 71mm.
Ater changing the last wide, the stress acting on first proximal phalange outward will be increase, exceeding more than 3 times of general high heel sandals. That may cause the halux to be valgus for a long time.
圖目錄 ..................................................................... 2
表目錄 ..................................................................... 4
第一章 緒論 ................................................................ 5
1-1 研究背景 ........................................................................... 5
1-2 足部解剖與生理 ..................................................................... 6
1-2-1 足部韌帶與足底筋膜 ............................................................. 8
1-2-2 足弓(Foot arch) ............................................................. 10
1-3 人類之步態週期 .................................................................... 11
1-4 拇指外翻 .......................................................................... 14
1-4-1 拇趾外翻症狀定義 .............................................................. 14
1-4-2 大拇趾外翻功能解剖學 .......................................................... 14
1-4-3 腳拇趾外翻受傷機轉 ............................................................ 15
1-5 文獻回顧 .......................................................................... 18
1-5-1 拇趾外翻之研究 ................................................................ 18
1-5-2 足部相關數值模擬 .............................................................. 24
1-6 研究目的 .......................................................................... 31
第二章 研究方法 ........................................................... 32
2-1 有限元顯示(EXPLICIT)運算理論 ...................................................... 32
2-2 本研究模型架構 .................................................................... 33
2-2-1 骨骼模型建立 .................................................................. 33
2-2-2 有限元素模型建立 .............................................................. 34
2-3 有限元素模型邊界與負載條件 ........................................................ 40
2-3-1 模擬驗證 ...................................................................... 40
2-3-2 模型邊界條件設定與驗證參數計算 ................................................ 43
2-4 探討不同楦頭寬度之高跟鞋與拇外翻效應 ............................................... 49
2-5 有限元素模型之運算 ................................................................ 52
第三章 結果與討論 ......................................................... 53
3-1 穿著高跟鞋步態實驗結果 ............................................................ 53
3-3 楦頭對於趾骨受力影響模擬條件....................................................... 62
3-4 模型的假設與限制 ................................................................... 71
第四章 結論 ............................................................... 74
第五章 參考文獻 ........................................................... 75
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