查詢結果分析
來源資料
相關文獻
- 股骨鎖定式骨髓內釘治療之有限元素分析
- Modified Finite Element Solutions for Planar Entry Flow of an Oldroyd-B Fluid
- Torsional Vibration Analysis of a Damped Shaft System
- 汽機葉片之機械力學分析研究
- 通勤者在平面道路與捷運路網上之運具與路線選擇
- p-Version Space-Time Least-Squares Finite-Element Method for Shallow-Water Equations
- T-型模具之有限元素法PID溫度控制分析
- 股脛關節之有限元素接觸應力分析
- 全觸式鞋內墊與足部之生物力學評估
- 機車安全帽之動態有限元素分析
頁籤選單縮合
| 題 名 | 股骨鎖定式骨髓內釘治療之有限元素分析=Finite Element Analysis for Interlocking Nailing of Femoral Fracture |
|---|---|
| 作 者 | 徐慶琪; 黃興祿; 毛世威; 趙振綱; 林晉; | 書刊名 | 黃埔學報 |
| 卷 期 | 52(工程科學類) 2007.03[民96.03] |
| 頁 次 | 頁63-69 |
| 分類號 | 416.26 |
| 關鍵詞 | 有限元素法; 鎖定式骨髓內釘; 內釘皮質骨接觸; Finite element analysis; Interlocking nail; Nail-cortical contact; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 股骨骨折之治療目前大家公認以鎖定式骨髓內釘 (interlocking nail) 是最好的選擇,然而鎖定式骨髓內釘的鎖定螺絲 (locking screw) 常會因受力而發生破壞,尤其在遠端股骨骨折的情況,本研究的目的是探討內釘皮質骨接觸 (nail-cortical contact) 對於股骨遠端鎖定螺絲應力之影響。使用有限元素分析軟體ANSYS,建立三維有限元素分析模型,包括:股骨、鎖定式骨髓內釘與鎖定螺絲,分別以完全結合界面模型與接觸界面模型作討論,並分別模擬鎖定式骨髓內釘與皮質骨接觸及鎖定式骨髓內釘不與皮質骨接觸兩種情形。在受力與邊界條件上,於股骨頭上施加700 N 的負載,並將遠端股骨表面定義為完全拘束,以模擬臨床上股骨的受力模式。 由本研究結果發現,內釘皮質骨接觸是影響植入物應力的主要因素,在皮質骨與鎖定式骨髓內釘不接觸的情況時,螺絲及內釘孔之應力會比皮質骨與鎖定式骨髓內釘接觸的情況來的高。Bucholz提出遠端鎖定螺絲距離骨折處5 公分以內時,應力會急遽升高之理論是有問題的,事實上它是與股骨峽部 (isthmus) 至鎖定螺絲之距離有關。同時我們也發現有限元素模型之鬆質骨應力,已超過鬆質骨之最大壓應力,所以分析時可以不考慮鬆質骨的存在。此外,將鎖定式骨髓內釘打入遠端皮質骨中,可降低鎖定螺絲的應力。 |
| 英文摘要 | Interlocking nail has been used successfully to treat the femoral shaft fracture. However, the locking screws are frequently subject to mechanical failure in situation with distal femoral fracture. The purpose of this research was to investigate the effects of nail-cortical contact on the stress of the implants. Three-dimensional finite element models, which consisted of femur, interlocking nail, and locking screws, were created by using commercial software ANSYS. Two kinds of interface conditions were studied in this research, bonded interface and contact interface. In addition, with nail-cortical contact and without nail-cortical contact were discussed. A vertical load of 700 N was applied to the center of the femoral head along the mechanical axis of lower extremity. The end of distal femur was fully constrained. The results of this research showed that the stress of the implants was mainly affected by nail-cortical contact. The von Mises stress of distal locking screw in situation with nail-cortical contact was smaller than that in situation without nail-cortical contact. In Bucholz’s model, the hypothesis of 5 cm distance was incorrect. It was related to the distance between the isthmus and distal locking screw. For all of the situation, the maximal compressive stress of the cancellous bone was greater than its ultimate value. It could be neglected in the finite element models. In addition, deep insertion of the nail to engage on the subchondral bone of distal femur may decrease the stress of distal locking screw. |
本系統中英文摘要資訊取自各篇刊載內容。