Biomechanical comparison of hard and soft hip protectors, and the influence of soft tissue
| Autor: | Paul Lips, A.J. van der Veen, Laura A. Schaap, N.M. van Schoor, T.H. Smit |
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| Přispěvatelé: | Physics and medical technology, Epidemiology and Data Science, Orthopedic Surgery and Sports Medicine, Internal medicine, Nutrition and Health, Sociology and Social Gerontology |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
musculoskeletal diseases
medicine.medical_specialty Histology Physiology Endocrinology Diabetes and Metabolism Calibration test Hardness medicine Journal Article Elderly people Humans Femur Comparative Study SDG 7 - Affordable and Clean Energy Musculoskeletal System Aged Orthodontics Impact testing Hip fracture business.industry Hip Fractures Protective Devices Biomechanics Hip protector Soft tissue Equipment Design medicine.disease Surgery Biomechanical Phenomena embryonic structures business |
| Zdroj: | Bone, 39(2), 401-407. Elsevier Inc. van Schoor, N M, van der Veen, A J, Schaap, L A, Smit, T H & Lips, P 2006, ' Biomechanical comparison of hard and soft hip protectors, and the influence of soft tissue ', Bone, vol. 39, no. 2, pp. 401-407 . https://doi.org/10.1016/j.bone.2006.01.156 van Schoor, N M, van der Veen, A J, Schaap, L A, Smit, T H & Lips, P 2006, ' Biomechanical comparison of hard and soft hip protectors, and the influence of soft tissue ', Bone, vol. 39, no. 2, pp. 401-7 . https://doi.org/10.1016/j.bone.2006.01.156 Bone, 39(2), 401-7. Elsevier Inc. |
| ISSN: | 8756-3282 |
| DOI: | 10.1016/j.bone.2006.01.156 |
| Popis: | INTRODUCTION: Hip protectors appear to be promising in preventing hip fractures. Currently, many different hip protectors exist, and it is not clear which hip protector has the best biomechanical properties. Therefore, the objective of this study was to compare the force attenuation capacity of 10 different hip protectors. Both hard hip protectors, which primarily shunt away energy, and soft hip protectors, which primarily absorb energy, were included.METHODS: Using a drop weight impact testing system and a surrogate femur, a weight of 25 kg was dropped from a height of 8 cm causing a force of almost 7,806 N on the bare femur, which simulates a severe fall. After this calibration test, soft tissue and the different hip protectors in combination with the soft tissue were tested. Each test was repeated six times. To simulate normal-weight elderly people, a 1/2-inch-thick layer of foam was chosen, reducing the force by 18%. To examine the influence of soft tissue thickness, soft tissue was also simulated by a 1-inch-thick layer of foam, reducing the force by 49%.RESULTS: In the 1-inch soft tissue test, all hip protectors were capable in reducing the impact to below the average fracture threshold of elderly people (3,100 N), although the hard types performed significantly better than the soft ones (P < 0.001). In the 1/2-inch soft tissue test, only the hard hip protectors were capable of attenuating the peak force to below the average fracture threshold of 3,100 N (hard vs. soft hip protectors: P < 0.001).CONCLUSIONS: This study showed that the hard, energy-shunting hip protectors were superior to the soft, energy-absorbing ones, especially in a simulation of normal-weight elderly people. With increased soft tissue thickness, soft hip protectors were also capable in reducing the impact to below the average fracture threshold of 3,100 N. |
| Databáze: | OpenAIRE |
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