title: [Preliminary clinical study on artificial cervical disc replacement by Mobi-C prosthesis].
abstract: OBJECTIVE
  To study the clinical application of Mobi-C prosthesis in treatment of anterior cervical discectomy and artificial disc replacement (ADR).
  
  
  METHODS
  Between January 2009 and June 2009, 20 cases of degenerative cervical disease were treated with anterior discectomy and ADR by Mobi-C prosthesis, including 13 cases of cervical disc herniation and 7 cases of cervical spondylotic radiculopathy, and 25 Mobi-C prosthesis were implanted. There were 8 males and 12 females, aged 29-54 years (mean, 45.2 years). The disease duration was from 4 days to 5 years (mean, 1.2 years). Affected segments of process included C3, 4 in 1 case, C4, 5 in 2 cases, Cs, 6 in 7 cases, C6, 7 in 5 cases, C4, 5 and C5, 6 in 2 cases, and C5, 6 and C6, 7 in 3 cases. Radiographs were taken regularly, and cervical range of motion (ROM) on segments of disc replacements were measured. The functions of cervical spinal cord were evaluated by "40 score" system (COA) preoperatively, immediately postoperatively, and at follow-up. The quality of life was evaluated by neck disability index (NDI) and visual analogue scale (VAS) score.
  
  
  RESULTS
  All incisions healed by first intention. No perioperative complication was found. All cases were followed up 16.5 months on average (range, 14-18 months). There was no significant difference in cervical ROM of operated segment between preoperation and follow-up duration (t = 0.808, P = 0.440). No heterotopic ossification was found at follow-up. COA score at last follow-up (38.20 +/- 1.14) was significantly higher than preoperative one (32.10 +/- 2.96), (t = 9.278, P = 0.000), and the improvement rate at last follow-up was 77.2% +/- 5.4%. VAS score at last follow-up (3.20 +/- 1.23) had significant difference when compared with preoperative one (5.10 +/- 1.29), (t = 10.585, P = 0.000). NDI score at last follow-up (29.40 +/- 4.55) had significant difference when compared with preoperative one (39.20 +/- 3.80), (t = 16.039, P = 0.000).
  
  
  CONCLUSIONS
  A satisfactory short-term curative effect can be obtained by using Mobi-C prosthesis in treatment of anterior cervical discectomy and ADR.
authors.affiliation: Department of Orthopedics, 309th Hospital of Chinese PLA, Beijing, 100091, P.R. China. bd95810@sohu.com
authors.forename: Da
authors.initials: D
authors.lastname: Bao
authors.forename: Yuanzheng
authors.initials: Y
authors.lastname: Ma
authors.forename: Xing
authors.initials: X
authors.lastname: Chen
authors.forename: Hongwei
authors.initials: H
authors.lastname: Li
authors.forename: Ming
authors.initials: M
authors.lastname: Hu
authors.forename: Tianjun
authors.initials: T
authors.lastname: Gao
mesh_terms: D000328:Adult; D001187:Artificial Organs; D002574:Cervical Vertebrae; D005260:Female; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000601:surgery; D008297:Male; D008875:Middle Aged; D055009:Spondylosis / Q000601:surgery*; D059145:Total Disc Replacement / Q000295:instrumentation / Q000379:methods*; D016896:Treatment Outcome