Effects of cervical spine posture on axial load bearing ability: a biomechanical study
| Autor: | Ali Fahir Ozer, Andalkar N, Tunc Oktenoglu, A C Sarioğlu, Lisa A. Ferrara, Edward C. Benzel |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Sheep
Lordosis business.industry Radiography Posture Biomechanics General Medicine Anatomy Compression (physics) medicine.disease medicine.disease_cause Biomechanical Phenomena Weight-bearing Weight-Bearing Spine (zoology) Motion Cervical Vertebrae Animals Medicine Displacement (orthopedic surgery) Stress Mechanical business Rachis |
| Zdroj: | Journal of Neurosurgery: Spine. 94:108-114 |
| ISSN: | 1547-5654 |
| DOI: | 10.3171/spi.2001.94.1.0108 |
| Popis: | Object. The authors conducted a study to assess the effects of cervical posture on the loadbearing ability of the cervical spine. Methods. Twelve cervical spine specimens obtained in 12 adult sheep were tested. The specimens were randomly separated into two groups. In Group I the specimens were fixed in a lordotic posture, and in Group II they were fixed in a straight posture. Axial compressive loads were applied at a constant rate of 5 cm/minute. Load-to-failure, time-to-failure, piston displacement at failure, and failure modes were recorded. Statistical analyses were performed to detect differences between the groups. There was no significant difference in load-to-failure values between the two groups. However, the time-to-failure and the piston displacement values for the straight spines were significantly less than those for the lordotic spines. Additionally, the straight spines failed predominantly through ventral elements, whereas the lordotic spines predominantly failed dorsally. Conclusions. It is concluded that a loss of a lordosis increases the risk of injury to the cervical spine following axial loading. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|