title: [Clinical application of titanium miniplate in cervical expansive open-door laminoplasty].
abstract: OBJECTIVE
  To evaluate the clinical effects of titanium miniplate in cervical expansive open-door laminoplasty in treating cervical spondylosis.
  
  
  METHODS
  From February 2009 to April 2011, 16 patients underwent expansive open-door laminoplasty by titanium miniplate fixation were classified as group A; 18 patients with conventional unilaterally open-door laminoplasty from March 2007 to January 2009 were served as control (group B). The operative time, blood loss during the operations, JOA score of the 6 months after operation, the incidence of axial symptom, curvature of cervical vertebrae were compared respectively between the two groups.
  
  
  RESULTS
  Operative time, blood loss, improvement rate of JOA in group A were respectively (122.0 +/- 26.8) min, (153.0 +/- 46.7) ml, (59.4 +/- 11.6)%; and in group B were (119.0 +/- 28.6) min, (151.0 +/- 50.4) ml, (58.7 +/- 12.7)%. Those showed no significant difference between two groups (P > 0.05). Three cases (18.75%) occurred obviously axial symptom in group A and six cases (33.33%) occurred in group B, there was significant difference in the incidence of axial symptom between two groups (P < 0.01). Preoperative and postoperative curvature of cervical vertebrae in group A was (17.9 +/- 5.2) degrees and (18.2 +/- 4.8) degrees, without significant difference; in group B, postoperative curvature of cervical vertebrae decreased obviously than the preoperative [(16.3 +/- 5.9) degrees vs (18.1 +/- 6.3) degrees] (P < 0.05).
  
  
  CONCLUSIONS
  Both surgical protocols are effective on preventing reclose of opened laminae, moreover the modified laminoplasty is advanced on reducing the occurrence of axial symptoms and loss of cervical curvature.
authors.affiliation: Department of the First Spinal Surgery, Wangling Hospital of China Academy of Chinese Medical Sciences, Beijing 100102, China. 271267062@qq.com
authors.forename: Shi-Min
authors.initials: SM
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.forename: Xing
authors.initials: X
authors.lastname: Li
authors.forename: Lu-Tang
authors.initials: LT
authors.lastname: Zhang
authors.forename: Yu-Zhang
authors.initials: YZ
authors.lastname: Liu
authors.forename: Zhao-Jie
authors.initials: ZJ
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000368:Aged; D001860:Bone Plates; D016022:Case-Control Studies; D002574:Cervical Vertebrae / Q000601:surgery*; D005260:Female; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D006801:Humans; D007796:Laminectomy / Q000379:methods*; D008297:Male; D008875:Middle Aged; D055009:Spondylosis / Q000601:surgery*; D014025:Titanium
chemical_list: D014025:Titanium