The Comparison Study Of Surgical Outcome Between Posterior Approach And Anterior Approach For Ossification Of Posterior Longitudinal Ligament

Introduction: Posterior longitudinal ligament(OPLL)was reported in 1838 in Japan and the first autopsy was reported in 1969.It is a hyperostotic condition which results in ectopic ossification in the posterior longitudinal ligament in the spi To compare the efficiene and can lead to myelopathy.It mostly effects patients between age 50-70 and is more common in Asian countries,ncy of anterior and posterior surgical treatments for the OPLL patients.We retrospectively studied two surgical approaches in 100 patients,which were randomly selected with ossification of posterior longitudinal ligaments who went through surgical treatment within the past five years with two different techniques(posterior single door laminoplasty and anterior cervical fusion surgery.Materials and Methods: We have selected and analyzed 100 patients randomly with ossification of posterior longitudinal ligaments who underwent trough surgical treatment within the past five years at orthopedic department of second affiliated hospital of China medical university.We divided the patients into 2 groups according to their surgical approach side.One group received anterior cervical decompression and fusion surgery and the other group received posterior single door laminoplasty.Results: Results On basis of our research the mean preoperative JOA score in posterior approach group was7.35 which later significantly raised to 12.90 and in the anterior group preoperative JOA score was 8.40 which significantly raised to 14,In the anterior approach group the mean preoperative VAS score was 2.17 which lowered to 1.05 after surgery and in the posterior approach group preoperative VAS score was 1.90 which lowered to 1.04 after surgery.Preoperative spinal canal stenosis was 8.25 mm in anterior group and7.33 mm in posterior group,which significantly raised to 14.12 mm in anterior group and 12.98 mm in posterior group after surgery.Mean bleeding was 188.23 cc in the anterior group patients and 276,7cc in the posterior group patients and 300 cc in combined patients overall.Mean operation time was 2h 45.4mins in anterior group,2h44.3mins in posterior group and 5h1 min in combined group(table2).Conclusion:.According to our study multiple level OPLL patients received better results by posterior approach and single level cervical OPLL patients received better result with anterior approach.This study reveals that anterior approach was alternative to posterior approach for single level OPLL and posterior approach was alternative to anterior approach for multilevel OPLL.