The short-term outcomes of Peek Prevail cervical interbody device in ACDF procedure for cervical spondylosis

English Keywords:Cervical spondylosis  Anterior cervical discectomy and fusion  Peek Prevail

English Abstract:

  【Abstract】 Objectives: To observe the short-term outcomes of Peek Prevail cervical interbody device in anterior cervical discectomy and fusion(ACDF) procedure for cervical spondylosis. Methods: From July 2014 to September 2014, 32 patients with cervical spondylosis who underwent Peek Prevail cervical interbody device in ACDF procedure were included in the study. All patients underwent single segmental fusion, among whom 14 cases were with cervical spondylotic myelopathy, 11 cases were with cervical spondylotic radiculopathy, 7 cases were mixed type. There were 18 males and 14 females with a mean age of 55.3±3.4 years old． Postoperative dysphagia and adjacent-level ossification were evaluated respectively by the Bazaz dysphagia score system and the Park adjacent-level ossification score. X-rays, CT and MRI for cervical spine were taken to assess the cervical curvature, the graft fusion and internal fixation. Neurologic function and clinical results were assessed by using visual analogue scale(VAS), Japanese Orthopaedic Association(JOA) score and neck disability index(NDI). Results: All patients were followed up for 6 to 7 months with an average of 6．5±0.7 months. The average operation time was 59.0±10.5min and the average intraoperative blood loss was 37.6±18.4ml. There were 3 patients(9.4%) complaining of dysphagia at 36 hours after surgery, 1 case(3.1%) suffered from spinal cord ischemia reperfusion injury at 6 hours after surgery, all the symptoms of the 4 cases disappeared or improved obviously after symptomatic treatment． All the patients had a satisfactory improvement of neurologic outcome． VAS score improved from 7.5±1.7 preoperatively to 2.5±1.2 at 6 months after surgery(P＜0.05), JOA score improved from 9.43±2.55 preoperatively to 16.07±1.02 at 6 months after surgery(P＜0.05), NDI score improved from 43.3±3.6 preoperatively to 10.7±2.9 at 6 months after surgery(P＜0.05), cervical curvature improved from -14.30°±1.9° preoperatively to 17.12°±1.4° at 6 months after surgery(P＜0.05). No failure of fusion, cage subsidence, adjacent-level ossification and internal fixation related complications were observed during follow-up． Conclusions： Peek Prevail cervical interbody device in ACDF procedure for cervical spondylosis shows an excellent early clinical outcome. The advantages of the device are convenient procedure, less bleeding, short operation time, lower incidence of postoperative dysphagia, satisfactory clinical outcome.