关键词: 颈椎, 单开门, Centerpiece钛板, 脊髓型颈椎病

Abstract: Objective To investigate the early clinical effects of posterior cervical single-door laminoplasty plus centerpiece titanium plate fixation for multi-segmental cervical spondylotic myelopathy.Methods 35 patients suffering from cervical spondylotic myelopathy who underwent C3-C7 single-door centerpiece titanium plate fixation were reviewed retrospectively.The neurofunction was evaluated by comparing Japan Orthopaedic Association（JOA）score measured before and 12 months after surgery.X-ray，CT and MRI were performed before operation，7 days after operation，6 months after operation and 12 months after operation.The sagittal diameter of C5 spinal canal on the CT was measured before operation and 12 months after operation respectively，and the expansion rate of C5 spinal canal was calculated.The C2-C7 Cobb angle were measured to evaluate cervical curvature by means of X-ray measured before and 12 months after surgery.Results All patients were followed up for 12～24 months.Radiographic findings at follow-up period showed spinal canal enlarged perfectly，and no door closing or instrument failure.The average JOA score for preoperation was （8.43±1.09）and （13.94±1.66）at 12 months after operation，with the improvement rate of（65.68±16.15）%.The mean sagittal diameter of C5 spinal canal was （9.49±1.30）mm before operation and （16.70±1.97）mm at 12 months，with the improvement rate of （76.88±14.66）% .The C2-C7 Cobb angle had a decreasing trend at the 12 months follow-up compared with preoperative values，and there was significant difference（P<0.05）.Conclusion Posterior cervical single-door laminoplasty plus centerpiece titanium plate fixation is reliable，nerve therapeutic effect and early clinical efficacy is satisfactory.

Key words: cervical vertebrae, unilateral open-door, centerpiece titanium plate, cervical spondylotic myelopathy