Retrospective Study And Preoperative Morphological Analysis Of Modified Single Open - Door Surgery For Cervical Spondylotic Myelopathy

Objective:To evaluate the modified expansive open-door laminoplasty spinal expandclinical efficacy in the treatment of multi-section of cervical myelopathy.Methods:A retrospective analysis by multi-segment multi-section cervical myelopathy(CSM) with modified single expansive open-door Laminoplasty (EL) surgery patientsthrough outpatient review, such as telephone and writing collected61cases completeinformation, improved the neck C3-C7spinous pruning and trimming of long bones,open the door on the implanted bone trough axis, the traditional suspension spinouslamina to the outer edge of the base position, increasing the opening angle. Observedbefore surgery, after1week, after6months, the last follow-up neurological JOA score,and by X-ray, CT and MRI measurements compared.Results:Preoperative MRI T2on the course of a long and high signal postoperativespinal Tips poor efficacy, mean follow-up of3.5years (0.3years to7.2years), after1week to improve neurological function improvement was63.7%±11.0%, excellent rateof90.5%, postoperative axial symptoms was8.9%, after June reached the door shaftside bony fusion, no cervical instability and kyphosis, no neurological symptoms.Conclusion:Improved EL cervical curvature and the maximum retention activity whilefully spinal decompression, avoiding complications of internal fixation, trauma, costlittle, that is effective and safe treatment for CSM, will be worthy of the benefit ofsurgical patients technology. Background:although posterior single door Laminoplasty currently accepted treatmentof CSM common and widely used methods, but fewer scholars Laminoplasty play animportant role in the slot on the door shaft of the bone has been studied.Objective:This study addressed the essential parameters of bone gutters for EL.Methods:Preoperative axial CT images of20patients suffering from cervicalmyelopathy were downloaded and entered into a computer. EL was then simulated usinga computer-assisted technique and the thickness of the laminae at the gutter sites wasmeasured.Results: Accordingly, the width of the bone gutter was linked mathematically with theangle of the lifted lamina and the thickness of the lamina at the lamina-lateral massjunction. Furthermore, the average thickness of the laminae at the gutter site was6.19mm, and the appropriate bone gutter for EL was5.13to7.15mm.Conclusion:The width of the bone gutter can thus be planned precisely preoperatively,which may help improve the safety and accuracy of expansive open-door laminoplasty.