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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/31851
標題: | 利用機械手臂關節測試系統與有限元素法研究
前距腓與跟腓韌帶之生物力學 Biomechanical Studies of Anterior Talofibular and Calcaneofibular Ligaments Using Robotic-based Joint Testing System and Finite Element Method |
作者: | Fang-Jie Jang 張方杰 |
指導教授: | 呂東武(Tung-Wu Lu) |
關鍵字: | 踝關節,前距腓韌帶,跟腓韌帶,有限元素法,機械手臂, Ankle,anterior talofibular ligament,calcaneofibular ligament,Finite Element Method,Robot, |
出版年 : | 2011 |
學位: | 碩士 |
摘要: | 踝關節在人體的活動中扮演著極為重要的角色,人類的動作,例如走路、上下樓梯以及各種運動,都仰賴於健康的踝關節,而在踝關節裡的前距腓與跟腓韌帶更是足踝穩定度的關鍵。過去的研究中指出,足踝損傷經常同時伴隨著踝關節韌帶傷害,而踝關節韌帶的傷害又以前距腓與跟腓韌帶發生的機率最高,因此過去有許多學者針對其性質做探討,希望能夠對韌帶的生物力學資訊深入瞭解,並可以提供臨床醫師作為手術的參考依據。
目前在生物力學界最大的難題,便是活體韌帶內力直接量測的困難,而在間接量測的方法上又有著既有無法突破的限制。過去關節的相關研究中,在試體的部分,是由機械手臂來做拉伸測試,作為評估軟組織在關節活動中之貢獻的依據,但在踝關節,由於距骨(Talus)的移動無法被控制,因此少有將該系統應用在踝關節的文獻;在模擬的部分,少有以適當的材料方程式來模擬韌帶的相關研究。 本研究利用核磁共振掃描,建構一包含脛骨、腓骨、跟骨、距骨、前距腓及跟腓韌帶踝關節有限元素模型;並整合機械手臂關節測試系統、三維動作捕捉系統,針對一踝關節試體進行背屈0度、5度、10度、蹠屈5度及10度關節韌帶鬆弛度測試,以實驗量測得之韌帶力量與有限元素模型計算所得之韌帶內力進行比對,驗證有限元素模型預測韌帶內力之可行性與精確度。 研究的結果指出,本研究發展之踝關節韌帶模型,輸入試體實驗之運動學資料後,可確實重現試體實驗時所測量之韌帶內力結果,確認此一建模方法之可靠度。未來更可以將此技術發展運用在活體上,建立客製化的踝關節韌帶模型,配合精確之骨頭運動學資料,以及個人化的韌帶材料參數,可以計算出功能性活動中韌帶的受力情況與分佈,進一步提供臨床復健與韌帶置換物的設計一份可靠的參考依據。 Ankle joint plays a very important role in human motion. Haman activities like normal walking, climbing upstairs and kinds of exercises, are depending on healthy ankle join, and in ankle joint, anterior talofibular ligament and calcaneofibular ligament are the key for stability. Past studies indicate that it is usually damaged ligaments when ankle injured, especially in anterior talofibular ligament and calcaneofibular ligament, so there are studies discuss about the properties of them, not only for the knowledge of biomechanics of ligaments, but also for the application of clinical surgery. The main challenge in biomechanics is that the internal force in ligaments in living is hard to measure, and limitations in non-direct way are hard to brake. The past studies about joint are using robotic system to process draw test, and obtain the data in soft tissue in joint motion, but the motion of Talus is uncontrolled in ankle, so the robotic system is not perfectly applied in ankle; in simulation, there are few studies using appropriate material to simulate ligaments. This study reconstructed an ankle model including tibia, fibula, talus, calcaneus, anterior talofibular and calcaneofibular ligament by MRI, then combine robotic joint testing system and motion analysis system to process laxity test in -10, -5, 0, 5, 10 Dorsiflexion, and using the experimental data to validate the accuracy of the model. The results of this study show that it is possible to reprocess a cadaver experiment in computer model. In the future this technology can be developed and applied on living body, with corrected kinematic data of bones and subject-specific ligament parameters it is possible to calculate the force in functional activities, and provide a reliable data for clinical rehabilitation and ligament replacement. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/31851 |
全文授權: | 有償授權 |
顯示於系所單位: | 醫學工程學研究所 |
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