Laminectomy In The Treatment Of Cerviacl Spondylotic Myelopathy Form Ossification Of Posterior Longitudinal Ligament Combined Ossification Of Ligamentum Flavum-the Efficacy Analysis

BACKGROUND:Ossification of cervical posterior longitudinal ligament. Key Reported in1839. but it was not until the1960s,the people understanded OPLL gradually and deeply.It occurred mostly in the50-60years old population, high incidence of the disease in the Japanese population, it is also known "Japanese disease", the ossification of cervical posterior longitudinal ligament in the cervical posterior longitudinal ligament, the formation of heterotopic ossification, Ossification of ligamentum flavum is the most common in thoracic, but is also often found in cervical, ossification of cervical posterior longitudinal ligament and ligamentum flavum surgical treatment and postoperative factors affecting the efficacy is rarely reported.OBJECTIVE:To investigate ossification of cervical posterior longitudinal ligament and ligamentum flavum surgical treatment and postoperative factors affecting the efficacy.METHODS:A retrospective analysis from May2007to March2011in our hospital for surgical treatment of36cases of cervical OPLL combined OLF patients, all patients were treated with decompression laminectomy. spinal cord function after follow-up recovery, analysis, preoperative duration of disease, preoperative JOA score (Japanese Orthopaedic Association.17points), segmental sclerosis, spinal cord signal changes and the curative effect relationship.RESULTS:36patients were followed up for10months to4years, an average of16months. According to the standard preoperative JOA score and postoperative evaluation of the efficacy. Postoperative JOA score was14.36(11-17). compared with the preoperative9.64(7-13) have improved significantly (t=10.48. P<0.01). after the excellent efficacy evaluation of20cases. good in11cases,5cases, excellent rate of86.1%.CONCLUSION:Decompression laminectomy is the treatment of cervical ossification of posterior longitudinal ligament ossification of yellow ligament merger reliable and effective surgical approach. Preoperative short course, JOA score high. single segment ossification and sagittal T2-weighted intramedullary signal no changes in patients good curative effect.