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頁籤選單縮合
題名 | Comparison of Stress Shielding among Different Cement Fixation Modes of Femoral Stem in Total Hip Arthroplasty--A Three-Dimensional Finite Element Analysis=不同骨水泥固定方式對於全人工髖關節置換術後應力遮蔽之比較--有限元素分析 |
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作者 | 陳文斌; 戴金龍; 李炫昇; 李柏成; 劉俊平; 施俊雄; | 書刊名 | Journal of Medical and Biological Engineering |
卷期 | 24:4 2004.12[民93.12] |
頁次 | 頁183-187 |
分類號 | 416.61 |
關鍵詞 | 有限元素分析; 應力遮蔽; 骨水泥; 全人工髖關節置換; Finite element analysis; Stress shielding; Cemented fixation; Total hip arthroplasty; |
語文 | 英文(English) |
中文摘要 | 以骨水泥或無骨水泥方式施行人工髖關節置換手術後,股骨近端皮質骨發生區域性骨質流失現象始終是骨科界無法解決的問題。應力遮蔽被公認為是造成骨質流失現象的主因之一。本研究以有限元素分析方法,針對無骨水泥、股骨柄上端包覆及股骨柄外圍全部包覆骨水泥等三種固定情況下,施行人工髖關節置換手術後三者間應力遮蔽及術後骨質流失的差異性。研究的方法,是利用人造股骨及電腦斷層影像分別建立完整股骨及以上述三種不同骨水泥固定方式施行人工髖關節置換手術後之股骨三維有限元素模型。在1,000牛頓的垂直壓力作用下,分別比較四種股骨之應變分佈差異性。分析結果顯示,無論以何種方式植入股骨柄,術後股骨近端均將產生應力遮蔽現象,其中以股骨柄上端包覆固定者所產生之應力遮蔽現象最為輕微;無水骨泥固定者最為顯著。我們研判,骨水泥的介入將使術後股骨應力分佈更為均勻,有利於減輕應力遮蔽效應。 |
英文摘要 | Local bone loss after cementless and cemented implantation of prostheses remains an unsolved problem during the long-term application of total hip replacement. Stress shielding is considered to be one of several important factors that result in local bone loss after prosthesis implantation. This study was designed to investigate the roles of bone cement different fixation configurations on initial stress shielding using a three-dimensional finite element analysis. Synthetic femora were used to create four finite element models including intact, and femora after implantation of C-fit stem with three different configurations of cement fixation: cementless, proximally-cemented and fully-cemented fixations. Under a 1,000-N vertical loading, the proximal strain distributions of the four models were analyzed and compared. The results revealed that, regardless of cement fixation configurations, stress shielding was found at the proximal femur following the insertion of stem. Less stress shielding was found for femur with fully-cemented fixation, whereas the most obvious stress shielding was found in the femur with cementless fixation. The introduction of bone cement was considered to produce more uniform transmission of external force, which led to the reduction of stress shielding. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。