کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10432604 | 910255 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Proximal femur bone strength estimated by a computationally fast finite element analysis in a sideways fall configuration
ترجمه فارسی عنوان
قدرت استخوان پروگزیمال توسط یک تحلیل عاملی با محدودیت محاسباتی سریع در پیکربندی سقوط باریک تخمین زده می شود
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کلمات کلیدی
استحکام استخوان، تجزیه و تحلیل عنصر محدود، توموگرافی کامپیوتری، پروگزیمال فمور،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی پزشکی
چکیده انگلیسی
Finite element (FE) analysis based on quantitative computed tomography (QCT) images is an emerging tool to estimate bone strength in a specific patient or specimen; however, it is limited by the computational power required and the associated time required to generate and solve the models. Thus, our objective was to develop a fast, validated method to estimate whole bone structural stiffness and failure load in addition to a sensitivity analysis of varying boundary conditions. We performed QCT scans on twenty fresh-frozen proximal femurs (age: 77±13 years) and mechanically tested the femurs in a configuration that simulated a sideways fall on the hip. We used custom software to generate the FE models with boundary conditions corresponding to the mechanical tests and solved the linear models to estimate bone structural stiffness and estimated failure load. For the sensitivity analysis, we varied the internal rotation angle of the femoral neck from â30° to 45° at 15° intervals and estimated structural stiffness at each angle. We found both the FE estimates of structural stiffness (R2=0.89, p<0.01) and failure load (R2=0.81, p<0.01) to be in high agreement with the values found by mechanical testing. An important advantage of these methods was that the models of approximately 500,000 elements took less than 11 min to solve using a standard desktop workstation. In this study we developed and validated a method to quickly and accurately estimate proximal femur structural stiffness and failure load using QCT-driven FE methods.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biomechanics - Volume 46, Issue 7, 26 April 2013, Pages 1231-1236
Journal: Journal of Biomechanics - Volume 46, Issue 7, 26 April 2013, Pages 1231-1236
نویسندگان
Kyle K. Nishiyama, Seth Gilchrist, Pierre Guy, Peter Cripton, Steven K. Boyd,