Introduction: Ossification of the cervical posterior longitudinal ligament is a calcification of PLL. Firstly, the clinical symtoms is so insidiously, commomly associated with cervical myelopathy in progress. Material and method: A cross-sectional study conducted in 33 patients whose diagnosis is cervical OPLL and were operated with anterior and posterior procedure at Spine Department in Viet - Duc Hospital from Oct 2008 to April 2010. Results:The mean age of 54.67 + or - 8.11 years old and sex ratio is approximately 2 males/1 females. Neck pain is 72.7 percent, sensation disorder (100 percent)
cervical myelopathy (60.6 percent), 75.8 percent disability in neck function. OPLL type B (48.5 percent) is more than other type, spinal cord injury (66.7 percent)
18.2 percent OPLL double layer in cr 'scanner, spinal stenosis with SAC 6 mm is 69.7 percent. JOA, NDI, VAS postoperation improve more than preoperative statistically significant in both anterior and posterior decompression (p 0.000l). High recovery rate in patient with short time of duration, mild spinal stenosis ( 60 percent, SAC 6-14 mm) and normal spinal cord (p 0.000l). Conclusions: Surgical treatment. of OPLL brings a good result in both anterior decompression and cervical laminoplasty procedure with recovery rate of cervical myelopathy syndrome is 78.8 percent.