title: [Cervical posterior laminoplasty operation using coralline hydroxyapatite].
abstract: OBJECTIVE
  To study the results of using coralline hydroxyapatite (CHA) in cervical posterior laminoplasty operation.
  
  
  METHODS
  Two hundred and fifty-six patients underwent cervical spinous process-splitting laminoplasty using CHA. All patients had been followed up over 3 months. One hundred and forty-two patients were followed up at least 2 years. All patients had spinal stenosis at least at 3 levels or OPLL. The average follow up time was 34.6 months.
  
  
  RESULTS
  The CHA grafts were stable between the split spinous processes. The union rate of CHA was 83.5%. After operation, the spinal cord moved dorsally, and the anteroposterior compression ratio had been improved from 0.19 to 0.42. No apparent kyphosis occurred. The JOA score improvement rate was 58.3%. There were 24 patients (17%) with axial symptom.
  
  
  CONCLUSIONS
  Cervical posterior laminoplasty operation using coralline hydroxyapatite may achieve good results.
authors.affiliation: Department of Spinal Surgery, Jishuitan Hospital, Beijing100035, China. liubowto@sohu.com
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Tian
authors.forename: Yong-qing
authors.initials: YQ
authors.lastname: Wang
authors.forename: Qin
authors.initials: Q
authors.lastname: Li
authors.forename: Lin
authors.initials: L
authors.lastname: Hu
authors.forename: Zhi-yu
authors.initials: ZY
authors.lastname: Li
authors.forename: Qiang
authors.initials: Q
authors.lastname: Yuan
mesh_terms: D000328:Adult; D000368:Aged; D018786:Bone Substitutes; D002516:Ceramics; D002574:Cervical Vertebrae / Q000601:surgery*; D005260:Female; D006801:Humans; D006882:Hydroxyapatites; D007796:Laminectomy / Q000379:methods; D008297:Male; D008875:Middle Aged; D019919:Prosthesis Implantation; D012189:Retrospective Studies
chemical_list: D018786:Bone Substitutes; D006882:Hydroxyapatites; C119955:coralline hydroxyapatite