目前市售的訂製式模組化人工膝關節，髕骨韌帶附著的位置在中間，在實際人體內，左膝與右膝的韌帶附著位置是左右各不相同，本研究主要探討髕骨韌帶附著位置對膝關節受力的影響。研究方法中收集了50個膝關節資訊，定義了髕骨韌帶的長度、角度及脛股骨旋向。在韌帶受力分析方面，藉由豬隻鎖合脛骨裝置，討論三種裝置鎖合韌帶的影響及韌帶經由手術線支撐力附著人工關節的受力情形，討論韌帶附著對人工關節位置的影響差異。在建構模型方面，利用人體膝關節矢狀面之電腦斷層影像，建構了人體膝關節脛骨關節含骨水泥之三維有限元素模型，模擬訂製式人工膝關節植入脛骨內，人體單腳站立時的負載情形，施以500N的荷重，探討其各材質間的應力變化，並考慮了負載轉移的影響；進而改變骨柄角度0°、15°、 30°及 45°探討其受力影響，結果顯示15°的設計有較佳的受力。然後將脛、股骨基準面的旋向分為三個群組，分別討論原始韌帶位置及人工關節韌帶位置對各材質的影響，結果顯示，原始韌帶附著位置比人工關節附著位置，可降低人工關節10.8%的MVMS受力及密質骨20.8%的MVMS受力，對骨水泥及鬆質骨影響較小。若考慮韌帶軟組織廣泛附著面的結合力（300N至450N），增加人工關節11.2%、骨水泥4.2%及密質骨7.1%的MVMS受力，向上韌帶力愈大可抵消愈多向下的受力。本研究結果顯示，髕骨韌帶附著方式和位置與施力，明確影響人工關節之受力情形，可做臨床醫療之參考。

Attachment of patella-tendon to the modular knee joint prosthesis is usually fixed to the middle position, but it is different from original attachment location for left and right knee in human body. This research is to investigate the attachment effects of patella-tendon ( PT ) in modular oncology prosthesis. Total 50 subjects were collected in this research and CT images of human knee joint in sagittal plane were used to generate a three-dimensional model for defining PT length and rotation angle of tibiofemoral. An in-vitro experiment of pig PT were performed to obtain the strength of PT and to test three design of locking devices of PT of modular knee prosthesis. A finite-element model of human tibial joint consisting of cortical bone, cancellous bone, and bone cement was used to simulate the loading condition of standing by one leg with 500N loading. The model of prosthetical tibial stem inserted with various interface geometry of collar angle (0°, 15°, 30°, and 45°) are used to investigate the effect of loading transmission. Results show that the collar angle design of 15° indicates the smaller maximum von Mises stress ( MVMS ). Moreover, rotation angle of tibiofemoral is divided into three groups to discuss the influence of original and artificial PT position. Results show that different artificial PT position decreases 10.8% MVMS on implant and 20.8% MVMS on cortical bone only as compared with the original one. With attachment force as 300N and 450N to implant by the soft tissue of PT, MVMS on implant increased as 11.2%, MVMS on bone cement as 4.2%, and MVMS on cortical bone as 7.1%. Result of this research reveals the significance of attachment of PT in prosthesis and can be referred in oncology surgery.

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