کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5020365 1469068 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of axial compression and rotation angle on torsional mechanical properties of bovine caudal discs
ترجمه فارسی عنوان
اثرات فشرده سازی محوری و زاویه چرخش بر خواص مکانیکی چرخشی دیسک های قاعده گاو
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
چکیده انگلیسی


- Multiple linear regression models were used to describe disc torsion mechanics.
- Geometric properties play a crucial role in disc torsion mechanics.
- Torsional mechanical properties changed nonlinearly with maximum rotation angle.
- Rate of change in torsional mechanics with compression depends on rotation angle.

The intervertebral disc is a complex joint that acts to support and transfer large multidirectional loads, including combinations of compression, tension, bending, and torsion. Direct comparison of disc torsion mechanics across studies has been difficult, due to differences in loading protocols. In particular, the lack of information on the combined effect of multiple parameters, including axial compressive preload and rotation angle, makes it difficult to discern whether disc torsion mechanics are sensitive to the variables used in the test protocol. Thus, the objective of this study was to evaluate compression-torsion mechanical behavior of healthy discs under a wide range of rotation angles. Bovine caudal discs were tested under a range of compressive preloads (150, 300, 600, and 900 N) and rotation angles (± 1, 2, 3, 4, or 5°) applied at a rate of 0.5°/s. Torque-rotation data were used to characterize shape changes in the hysteresis loop and to calculate disc torsion mechanics. Torsional mechanical properties were described using multivariate regression models. The rate of change in torsional mechanical properties with compression depended on the maximum rotation angle applied, indicating a strong interaction between compressive stress and maximum rotation angle. The regression models reported here can be used to predict disc torsion mechanics under axial compression for a given disc geometry, compressive preload, and rotation angle.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanical Behavior of Biomedical Materials - Volume 77, January 2018, Pages 353-359
نویسندگان
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