کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
875651 910790 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of the bending performance of solid and cannulated spinal pedicle screws using finite element analyses and biomechanical tests
ترجمه فارسی عنوان
مقایسه عملکرد خمش پیچ و مهره های ستون فقرات جامد و کانولا با استفاده از تجزیه و تحلیل عناصر محدود و آزمایش های بیومکانیک
کلمات کلیدی
خم شدن عملکرد، شکستن پیچ خورده تجزیه و تحلیل عنصر محدود، آزمایش بیومکانیک
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
چکیده انگلیسی


• Bending performances of solid and cannulated spinal pedicle screws were analyzed and compared using finite element analyses and biomechanical tests.
• Cylindrical spinal pedicle screws with a cannulated design had significantly poorer bending performances.
• Conical spinal pedicle screws maintained their bending performances, whether they were solid or of a cannulated design.
• Adding a pin to the cannulated spinal pedicle screws did not improve the bending performances.

Spinal pedicle screw fixations have been used extensively to treat fracture, tumor, infection, or degeneration of the spine. Cannulated spinal pedicle screws with bone cement augmentation might be a useful method to ameliorate screw loosening. However, cannulated spinal pedicle screws might also increase the risk of screw breakage. Thus, the purpose of this study was to investigate the bending performance of different spinal pedicle screws with either solid design or cannulated design. Three-dimensional finite element models, which consisted of the spinal pedicle screw and the screw's hosting material, were first constructed. Next, monotonic and cyclic cantilever bending tests were both applied to validate the results of the finite element analyses. Finally, both the numerical and experimental approaches were evaluated and compared. The results indicated that the cylindrical spinal pedicle screws with a cannulated design had significantly poorer bending performance. In addition, conical spinal pedicle screws maintained the original bending performance, whether they were solid or of cannulated design. This study may provide useful recommendations to orthopedic surgeons before surgery, and it may also provide design rationales to biomechanical engineers during the development of spinal pedicle screws.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Medical Engineering & Physics - Volume 37, Issue 9, September 2015, Pages 879–884
نویسندگان
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