本研究利用承筒與殘肢接觸面緊密貼合的全接觸式(TSB, Total Surface Bearing)概念設計小腿義肢承筒，並以快速成型機(RP, Rapid Prototyping)製作出殘肢陽模，接著包覆樹脂層完成承筒製作，供小腿截肢患者試用，期待均勻地分散殘肢與承筒接觸的介面壓力。並實際進行使用者穿戴TSB小腿義肢承筒的步態實驗、介面壓力量測與耐疼痛壓力量測。另外，以有限元素分析方法預估殘肢與承筒接觸的介面壓力，比較預估值與實驗結果，以協助承筒形狀設計。
建立有限元素分析模型時，殘肢係使用加壓取模的方式獲得殘肢均勻受壓的模型，掃描並匯入電腦輔助軟體SolidWorks中進行建模；其中骨頭模型則以X光掃描之骨頭照片建立。再逐步將殘肢軟組織、內承筒、承筒模型建立。
本研究實驗結果，發現使用TSB承筒時，在髕骨韌帶與脛骨末端介面壓力值比傳統手工PTB承筒低，而且遠低使用者可承受的耐疼痛壓力；步態分析的結果則顯示使用TSB承筒時，在額切面與橫切面的下肢關節角度變化均較PTB承筒更接近常人的角度變化。
承筒使用者主觀感受認為本研究使用的承筒上方夾持部位稍微寬鬆，會擔心行走時義肢掉落，造成步態量測的步伐速度、殘肢側站立期下降；除此之外，使用者對於承筒的機動性與舒適性尚可接受。
本研究使用步態量測獲得的測力板資料進行步態站立期的擬靜態模擬，使用ANSYS靜態分析模組，模擬的結果並不很理想，唯模擬的流程可供接續者繼續進行有限元素模擬的參考。

This study is to verify the effectiveness of a TSB (total surface bearing) transtibial socket fabricated by following a CAD/RP process, which integrates CAD systems and rapid prototyping (RP) technology. The experiments include the use of a motion analysis system to obtain the gait pattern and an interface pressure measuring system to identify the pressure distribution at the pressure tolerant and sensitive areas of a stump. This study also tries to establish a simulation procedure to estimate the pressure distribution on stump during the amputee using a specific TSB socket. And, a comparison on interface pressures was made to evaluate the simulation result and tried to assist the design of a socket shape.
For interface pressure simulation, the FEA (finite element analysis) model was constructed by employing the stump mold, which was duplicated by using a vacuum casting tool, to build the shape of soft tissue. And, the X-ray image of the stump was employed to form the bone model. Combining a socket model and a liner designed in a CAD system, a simulation modeling was then implemented in ANSYS by setting up boundary conditions. The simulation in this study employed quasi-static load to intimate the reaction forces exerting on the prosthetic foot during the stance phase of a prosthesis.
The results of the experiments of two volunteer subjects showed that the interface pressures exerting on the stump of the two amputees while using TSB sockets were lower than that of using PTB (patella tendon bearing) sockets, which were manually made by well experienced prosthetists. And, the pain tolerant pressures on patella tendon and tibial end of two amputees are much larger than that of measured pressures while wearing any type of testing sockets. According to the results of gait analysis, the angle variations of lower limb joints while wearing TSB sockets were more similar to normal gait than wearing traditional PTB sockets. However, the results of FEA simulation were not well meet the experimental data.
Except the quantitative results summarized previously, the amputees’ subjective views showed that the prostheses with TSB sockets might dropped down because the sockets were not firmly clamped around knee. This resulted in the normal walking speed and support period of stump side are worse than that of traditional PTB sockets. Other than the subjective views, the mobility and comfortableness of wearing TSB sockets were basically accepted by the two amputees.

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