Fatigue failure in shear loading of porcine lumbar spine segments
| العنوان: | Fatigue failure in shear loading of porcine lumbar spine segments |
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| المؤلفون: | van Royen Bj, Idsart Kingma, van Dieën Jh, van der Veen A |
| المساهمون: | Kinesiology, Research Institute MOVE |
| المصدر: | van Dieen, J H, van der Veen, A, van Royen, B J & Kingma, I 2006, ' Fatigue failure in shear loading of porcine lumbar spine segments. ', Spine, vol. 31, pp. E494-8 . https://doi.org/10.1097/01.brs.0000224515.40694.2c Spine, 31, E494-8. Lippincott Williams & Wilkins |
| بيانات النشر: | Lippincott Williams & Wilkins, 2006. |
| سنة النشر: | 2006 |
| مصطلحات موضوعية: | Compressive Strength, Fractures, Stress, Shear force, Sus scrofa, In Vitro Techniques, Thoracic Vertebrae, Weight-Bearing, medicine, In vitro study, Animals, Orthopedics and Sports Medicine, Range of Motion, Articular, Intervertebral Disc, Lumbar Vertebrae, business.industry, Fatigue testing, Stiffness, Anatomy, Fatigue limit, Neutral position, Shear (geology), Torque, Spinal Fractures, Lumbar spine, Neurology (clinical), Stress, Mechanical, medicine.symptom, business, Shear Strength |
| الوصف: | STUDY DESIGN.: An in vitro study on porcine spinal segments. OBJECTIVES.: To determine the differences in mechanical behavior and fatigue strength in shear loading between intact spinal segments and segments without posterior elements, and between segments in neutral and flexed positions. SUMMARY OF BACKGROUND DATA.: Limited data are available on shear strength of spinal segments. Literature suggests that shear loading can lead to failure of the posterior elements and failure of the disc, when the posterior elements cannot provide adequate protection. METHODS.: In 2 experiments, 18 and 20 spines of pigs (80 kg) were used, respectively. Shear strength of the T13-L1 segment was tested, while loaded with 1600-N compression. L2-L3 and L4-L5 segments were loaded with a sinusoidal shear between 20% and 80% of the strength of the corresponding T13-L1 segment and 1600-N compression. In experiment No. 1, the posterior elements were removed in half the segments. In experiment No. 2, half the segments were tested in the neutral position, and half were tested in 10° flexion. RESULTS.: The group without posterior elements had failure earlier than the intact group. In the group without posterior element, stiffness increased on failure; in the intact group, it decreased. In experiment No. 2, no differences between groups were found. CONCLUSIONS.: Repetitive shear loading can induce failure of porcine spinal segments, likely caused by fracture of the posterior elements, and, although repetitive anterior shear forces can also induce disc damage, this appears not to occur in intact segments, not even when flexed close to maximal. ©2006, Lippincott Williams & Wilkins, Inc. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1528-1159 0362-2436 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d3c03917f22d768afd187768f6b0da7 https://doi.org/10.1097/01.brs.0000224515.40694.2c |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....1d3c03917f22d768afd187768f6b0da7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15281159 03622436 |
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