title: Cervical disc arthroplasty versus fusion for single-level symptomatic cervical disc disease: a meta-analysis of randomized controlled trials.
abstract: OBJECTIVE
  To evaluate the safety and effectiveness of cervical disc arthroplasty (CDA) versus anterior cervical discectomy and fusion (ACDF) for single-level symptomatic cervical disc disease.
  
  
  METHODS
  We identified eligible randomized controlled trials (RCTs) in PubMed (April 2011), EMBASE (April 2011) and Cochrane Central Register of Controlled Trials (April 2011). Data were collected and extracted by two reviewers independently. The methodological quality and clinical relevance of the included studies were assessed. Data analysis was conducted with RevMan 5.0.
  
  
  RESULTS
  Six RCTs involving 1,745 patients were included. The pooled analysis showed a higher prevalence of neurological and overall success [(P = 0.004, RR = 1.06, 95% CI = 1.02-1.10), (P = 0.0005, RR = 1.14, 95% CI = 1.06-1.22)], and a lower incidence of dysphagia and reoperation related to adjacent-segment degeneration [(P = 0.04, RR = 0.30, 95% CI = 0.09-0.97), (P = 0.03, RR = 0.46, 95% CI = 0.23-0.91)] with CDA compared to ACDF. However, there was no statistical difference in neck disability index (P = 0.92, SMD = 0.01, 95% CI = -0.25 to 0.27), neck and arm pain scores[(P = 0.33, SMD = -0.12, 95% CI = -0.37 to 0.13), (P = 0.54, SMD = 0.17, 95% CI = -0.36 to 0.70)], incidence of complications related to the implant or surgical procedure and reoperation related to primary surgery [(P = 0.32, RR = 0.76, 95% CI = 0.45-1.30), (P = 0.09, RR = 0.48, 95% CI = 0.20-1.12)].
  
  
  CONCLUSIONS
  Compared with ACDF, CDA carry a lower incidence of dysphagia complications and reoperation related to adjacent-segment degeneration, and a higher prevalence of neurological and overall success at 2 years postoperatively. As the poor quality of the included studies, it is still uncertain whether CDR is more effective and safer than ACDF treating single-level symptomatic cervical disc disease. Future large-scale RCTs with long-term follow-up are needed to provide clear evidence.
authors: Department of Orthopedics and Spine Surgery, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing 210008, People's Republic of China.
authors: Hua
authors: H
authors: Jiang
authors: Zezhang
authors: Z
authors: Zhu
authors: Yong
authors: Y
authors: Qiu
authors: Bangping
authors: B
authors: Qian
authors: Xusheng
authors: X
authors: Qiu
authors: Mingliang
authors: M
authors: Ji
mesh_terms: D001178:Arthroplasty; D002574:Cervical Vertebrae / Q000601:surgery*; D006801:Humans; D055959:Intervertebral Disc Degeneration / Q000601:surgery*; D007405:Intervertebral Disc Displacement / Q000601:surgery*; D016032:Randomized Controlled Trials as Topic; D013123:Spinal Fusion