Study On The Influence Of Rib Cage On The Static And Dynamic Characteristics Of Scoliosis Spine

The thorax is a cage structure composed of ribs,sternum and costal cartilage.Together with thoracolumbar spine,it bears 2/3 of the human body’s mass and plays an important role in maintaining the stability of thoracolumbar spine.Previous studies on the relationship between thoracic spine and thoracic spine mainly focused on static load and focused on a specific disease.At present,there is a lack of thoracic analysis of the dynamic characteristics of the normal spine and scoliosis,and the analysis of the static effects of thoracic on the normal spine and scoliosis is not systematic enough.Therefore,it is urgent to explore what role thoracic plays in the stabilization of the structure of the normal spine and scoliosis.In order to study the effect of thorax on the dynamic and static characteristics of scoliosis spine,the normal spine was selected as the reference group.The horizontal and vertical comparison can more vividly and concretely explain the effect of thorax on the static characteristics of scoliosis spine.Understanding the different effects of thorax on normal spine and scoliosis spine under static and dynamic conditions can help patients avoid further deterioration of scoliosis.Based on the CT scans of normal spine and scoliosis spine,the thoracolumbar and sacral spine models of normal spine and Scoliosis Spine with or without thorax were established.The dynamic and static analysis of the four models were carried out by using Abaqus software,and the effects of thorax on the stability of normal spine and scoliosis spine were systematically and comprehensively explored.1)Static analysis shows that the thorax can effectively protect the T3-T8 segments of the thoracic spine in the forward and backward postures.Under the left and right bending posture,the thorax can tightly encircle the scoliosis segments.The thorax protects the scoliosis segments of the scoliosis spine.The reduced stress concentration is more obvious.Left and right bending are the important sources of Scoliosis Spinal injury.In upright posture,the reduction of stress in thoracic contralateral scoliosis mainly concentrated in the T5-T6 segments.2)The modal analysis shows that when added the thorax,the frequency of the scoliosis spine’s own vibration has been increased,which requires more intense vibration to cause its own resonance,it can increase the stability of the spine structure from its inherent attributes.3)Steady-state analysis shows that the reduction of the amplitude of scoliosis spine is more obvious in the upper and lower directions of thorax,and the stability of the opposite scoliosis spine in the same direction is enhanced more.On the contrary,the amplitude of Scoliosis Spine is increased in the front and back directions of outline,which will further deteriorate the scoliosis spine.This paper used medical imaging technology and reverse engineering technology,the three-dimensional model of thoracolumbar sacral spine with or without thorax and scoliosis was established.Combining biomechanics and finite element theory,the dynamic and static analysis of the four models was carried out,and the effects of thorax on the characteristics of normal spine and scoliosis spine were explored.It provides a scientific basis for the stable relationship between thorax and spine,helps normal people and scoliosis patients to understand their own characteristics,and comprehensively improves the level of prevention and rehabilitation of scoliosis.