Experimental Research On Compression Fracture Of Single Vertebrae For Rabbit Spine

The spine is the central axis of the human body,consisting of 26 bones,as well as intervertebral discs,ligaments,joints,and so on.The upper spine supports the skull,the sidepiece with ribs attached,and the end with hip bone connected.The spine is the posterior wall of the thoracic cavity,abdominal cavity and pelvic cavity.The spine supports both the trunk and the internal organs.It also protects the spinal cord and has motor function.When a heavy object hits the head,neck,the back or the shoulder,or falling from a high point,or suffering a cave-in accident,traffic accident,natural disaster,etc.,the spine is prone to damage.Bony structures in the spine,such as vertebrae,vertebral arch,and lamina,invading spinal canal can cause spinal cord compression,and even small bleeding and granulation tissue can cause paraplegia.Spinal injury,severe injury,complicated,more compound injuries,more complications,being of great harm to sense,sports,and reflection of human body,may cause the injured permanent disability or life threatening.In clinical practice,spinal injury is a common injury caused by traffic accidents,high falling or other blows.Spinal injuries occur more often in the segments of thoracic and lumbar,where fractures are common,mainly because of the thoracolumbar spine is at the junction of two physiological curves.The most common types of spinal injuries or fractures are compressibility and explosive fractures.Considering the seriousness of the spinal injury and the importance of biomechanical research,and the human specimen not easy to get,also not easy to carry out large sample size of experimental research,this paper conducted an experimental research on compression fracture of single vertebrae for rabbit Spine.Grouping rabbits according to the different age,dissecting the rabbit spinal after freezing,eliminating the redundant soft tissue on the spine,isolating rabbit vertebral bodies,including the cervical,thoracic and lumbar spine,then do the experimental research on compression fracture of single vertebrae for rabbit spine in Instron5544.The specific research content mainly has:1.In this paper,the compression and destruction of the cervical vertebrae were performed,back to front,and load-displacement curve of was obtained.2.Compress the rabbit thoracic and lumbar spine for the axial,at the same time in the central ventral of the vertebral paste strain gauges,the axial load-displacement curve of the vertebral body,and load-time curve,also obtained strain-time relation through strain gauge records.By the CT scan of the vertebral body before the experiment,the cross-sectional area of the vertebral body was calculated,and the stress-strain curve of the vertebral body of the calculated.Through the analysis of the curve,the limit load,limit stress,and limit strain of the single vertebral body of rabbits were obtained.3.The effects of rabbit body weight,rabbit age,different vertebral bodies and other factors on the limit load,ultimate stress and ultimate strain of the vertebral body were studied by the compression experiment of single vertebrae for rabbit spine.The following conclusions can be drawn from the analysis and arrangement of experimental data:1.The rabbit's age has a significant effect on the ultimate load,and with the increasing of the rabbit's age,the ultimate load of most vertebrae which could bear is increased for the same name vertebrae;2.The vertebral body at the physiological bending position of the spine is prone to fracture or damage,it is because the maximum load of the vertebral body at the physiological bending position is significantly smaller than that of the adjacent vertebral body;3.The results of this paper can be employed to validate the finite element analysis model of rabbit vertebral compression.The results of this study are of great significance for understanding the mechanism of spinal injury,prevention and reduction of fracture injuries,and safety protection in production and life,also can provide important guiding to clinical evaluation and treatment of spinal injury.The study of this paper can provide some reference for the dynamic experiment,segmental experiment and finite element simulation.