Biomechanical Study Of Intervertebral Fusion And Intervertebral Fixation Under Spinal Endoscope

Background:In today's increasingly competitive society and the growing fatigue of everyday life,waist fatigue and long-term damage?lumbar spine overuse and subjected to external shock or long-term load,spinal progressive lesion side bend and lesions of the anti-kyphosis and other spinal deformities and can easily cause nerve root oppression,further damage the clinical symptoms such as nerves,what is one common orthopedic diseases more often in the elderly.In recent years,the trend was younger severely affect the patient's work and life,degenerative disease of the lumbar vertebral body caused by various factors such as nucleus pulposus out?lumbar spine flexible and wide range of activities and so on.In recent years,rapid development of spinal surgery has become the first choice for treatment of lumbar interbody fusion,and the feedback effect in clinical application is good.Choosing an effective and negatively effective surgical approach and strong internal fixation is the key to treatment.The vertebral fusion under the posterior lumbar intervertebral foramen and the assisted internal fixation have extremely advantageous advantages in the treatment of this type of lumbar disease.How to choose implant materials such as material sources,material selection and methods,is currently controversial in the clinical treatment of lumbar fusion.As the"gold standard"implant material-autologous bone particles are widely used in clinical practice,such as upper limbs,lower limbs,femoral head necrosis and other therapeutic effects,there are many academic research reports for the treatment of lumbar instability,traditional bone grafting.The bone is harvested in the humerus area,but there are many complications such as bone graft displacement,insufficient strength of the bone grafting area,collapse,and pain in the tibia bone collection area;And the amount of autologous bone removed under the intervertebral foramen is not enough to fill the intervertebral space and other problems.But the invention of intervertebra l fusion effectively solves the maintenance of the height of the intervertebral space,the stability immediately after the operation,and the recovery time of the bed is shortened.This subject is mainly designed to provide a stable biomechanical basis for the treatment of intervertebral foramen with Cage combined with autologous bone granule compression and bone grafting and pedicle screw fixation.Objectives:Using the artificial damage of the spine model to achieve a simulated human spinal instability model for biomechanical studies,comparing the immediate postoperative stability of endoscopic intervertebral foramen simple fixed Cage and endoscopic Cage and internal fixation combined with autologous bone suppression,adequate and favorable data through r esearch provides theoretical and data-based guidance for clinical implementation of the procedure.Discuss they clinical surgical techniques and operability,and provide effective clinical application and promotion basis.Methods:Use 12 human spine models to take it?L1-L4?,manual splitting and grinding makes the model different.Randomly disrupted grouping,first group:Intervertebral foramen single Cage-pedicle screw assisted internal fixation group?ie experimental group?;Group II:transforaminal Cage microscope combined with autologous bone impaction grafting-the pedicle screw fixation assistant group?control group?.Method for fixing the fitted model of the spine segments L1 and L4,and the model is polished to damage spinal unstable waist model.Statistical analysis was performed using spss21.0?physiological activity to measure different data?.Results:Normal lumbar vertebrae:L_2-3 segment activities in all directions?ROM??Rotation?flexion and extension?side bend?NZ?,all statistically calculated that P is greater than 0.05 and there is no significant difference,indicating that the specimen balance is in accordance with comparable conditions.The unstable state is compared with the normal state of the lumbar spine:in all directions?ROM??Rotation?flexion and extension?in addition to the neutral zone range value of the side-bending direction?both were statistically calculated to have a significant difference of P less than 0.05.Unstable s tate fusion lumbar spine compared with the normal state:in all directions?ROM??Rotation?flexion and extension?side bend?NZ?both were statistically calculated to have a significant difference of P less than 0.05.Conclusions:relatively speaking,posterior lumbar intervertebral forcing combined with autologous bone compression and bone grafting-pedicle screw fixation as a new fusion technique than posterior intervertebral foramen single Cage-pedicle screw assisted internal fixation the immediate stability o f the former is greater than the latter.The latter clinical effect is more accurate in terms of the fusion rate and the maintenance and improvement of the intervertebral space height and the physiological curve,and the former is more stable in the application of post-clinical treatment.