The Analysis Of The Therapeutic Effect Of Cervical Ossification Of Posterior Longitudinal Ligament Using Double-door Laminoplasty

OBJECTIVE:To verify the clinical efficacy of posterior decompression with or without internal fixation of cervical Double-door laminoplasty for multi-segmental cervical ossification of posterior longitudinal ligament (OPLL).METHODS:The clinical data of56Patients from2006to2008with cervical OPLL were reviewed and analyzed, age of45to78years, average55.2years old, while involved32men and24women, were respectively decompressed from posterior approaches with or without internal fixation. Patients were followed up for2to3years,3.8years on average. Lateral cervical spine x-ray, flexion film had held out, CT scan, sagittal reconstruction, and MRI examinations were routinely taken preoperatively and postoperatively. Results of operations according to JOA scoring system, which was formulated by Japanese Orthopaedic Association, were evaluated. Neurological function was evaluated on preoperatively and postoperatively. The data was evaluated by SPSS13.0analysis software. The difference was statistical significance when P<0.05. Surgical complications and factors affecting the surgical results were also recorded.RESULTS:Fifty-six patients constitute the clinical material.26cases were treated by posterior double-door laminoplasty and fixation and30cases received posterior double-door laminoplasty without fixation, The two populations were similar. It was found that both can achieve satisfactory outcomes, and posterior surgery without internal fixation was accomplished in a shorter period of time with lesser blood loss. However, the operation with internal fixation was more difficult and associated with higher risks and complications. Despite its limitations, it can help correct and maintain the physiological curvature of cervical verterbra, increase its stability and prevent the growth of OPLL after operation。Conclusion:It was found that both can achieve satisfactory outcomes, and posterior surgery without internal fixation was accomplished in a shorter period of time with lesser blood loss with lesser complications. However, the operation with internal fixation was more difficult and associated with higher risks and complications. Despite its limitations, it’s more effective, which can help correct and maintain the physiological curvature of cervical verterbra, increase the stability and prevent the growth of OPLL after operation.