title: [Spinal navigation with intra-operative 3D-imaging modality in lumbar pedicle screw fixation].
abstract: OBJECTIVE
  To evaluate the efficacy and safety of spinal navigation with intra-operative 3D-imaging modality in lumbar pedicle screw fixation.
  
  
  METHODS
  401 patients with lumbar degenerative disorders or fracture were randomly divided into 2 groups: Group A, undergoing pedicle screw fixation by spinal navigation with intra-operative 3D-imaging system, and Group B undergoing pedicle screw fixation by traditional method. The position of pedicle screw was assessed by intra-operative 3D-imaging system. The excellent rate of pedicle screw position, mean time of pedicle screw implantation, operating time, blood loss, and post-operative complication were compared.
  
  
  RESULTS
  The excellent rate of pedicle screw position was higher Group A was 95.3%, significantly higher than that of Group B (84.1%, P < 0.001). The mean time of pedicle screw implantation and operating time of Group A were (3.70 +/- 0. 65) min, significantly shorter than that of Group B [(7.83 +/- 2.32) min, P < 0.001]. The blood loss amount of Group A was (272 +/- 153) ml, significantly less than that of Group B [(455 +/- 289) ml, P < 0.05]. However, the total operating time of Group A was (134 +/- 48) min, not significantly different from that of Group B [(179 +/- 62) min, P > 0.05].
  
  
  CONCLUSIONS
  With spinal navigation combined with the intra-operative 3D-imaging modality, implantation of lumbar pedicle screw is more simplified, more accurate, safer, and with shorter operating time.
authors.affiliation: Department of Orthopedics, Dongzhimen Hospital, Beijing 100700, China. yuxing34@sina.com
authors.forename: Xing
authors.initials: X
authors.lastname: Yu
authors.forename: Lin
authors.initials: L
authors.lastname: Xu
authors.forename: Lian-yan
authors.initials: LY
authors.lastname: Bi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001863:Bone Screws; D005260:Female; D005593:Fracture Fixation, Internal / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D021621:Imaging, Three-Dimensional; D008159:Lumbar Vertebrae / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D025321:Surgery, Computer-Assisted / Q000379:methods*; D016896:Treatment Outcome