کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
871807 910201 2016 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sagittal rotational stiffness and damping increase in a porcine lumbar spine with increased or prolonged loading
ترجمه فارسی عنوان
سفتی چرخش ساژیتال و افزایش سرعت در ستون فقرات کمری گوشت خوک با بارگذاری افزایش یافته یا طولانی مدت
کلمات کلیدی
ستون فقرات؛ واحد عملکردی ستون فقرات؛ دینامیک؛ سختی دمیدن؛ بارگیری پاندول؛ تست آزمایشگاهی؛ واحد عملکردی ستون فقرات؛ دینامیک؛ تحمل وزن؛ ستون فقرات کمری
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
چکیده انگلیسی

While the impact of load magnitude on spine dynamic parameters (stiffness and damping) has been reported, it is unclear how load history (exposure to prolonged loading) affects spine dynamic parameters in sagittal rotation. Furthermore, it is unknown if both spine stiffness and damping are equally affected to prolonged loading. Using a pendulum testing apparatus, the effect of load magnitude and load history on spine sagittal rotational stiffness and damping was assessed. Nine porcine lumbar functional spine units (FSUs) were tested in an increasing compressive load phase (ICP: 44.85, 68.55, 91.75, 114.6 kg) and then a decreasing compressive load phase (DCP: 91.75, 68.55, and 44.85 kg). Each trial consisted of flexing the FSU 5° and allowing it to oscillate unconstrained. During the ICP, both stiffness and damping linearly increased with load. However, in the DCP, stiffness and damping values were significantly higher than the identical load collected during the ICP, suggesting load history affects sagittal rotational dynamic parameters. In addition, spine damping was more affected by load history than spine stiffness. These results highlight the importance of controlling load magnitude and history when assessing spine dynamic parameters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biomechanics - Volume 49, Issue 4, 29 February 2016, Pages 624–627
نویسندگان
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