title: [Biomechanical comparative study of lumbosacral fixation and Jackson intrasacral fixation].
abstract: OBJECTIVE
  To assess the biomechanical properties of Jackson intrasacral fixation technique and other lumbersacral internal fixation systems, and to provide the basis of biomechanics for the clinical application of Jackson technique.
  
  
  METHODS
  The biomechanical properties of Dick, RF, Steffee, CD, and Jackson technique were studied by testing the inflexion, extension, compression, torsion, and lateral bending in 15 calf fresh-frozen specimens and 5 fresh-frozen human cadavaric specimens, which were divided into 5 groups with similar bone density.
  
  
  RESULTS
  Jackson intrasacral fixation device was stiffer than any other devices. On the "load-displacement" curve, Jackson intrasacral fixation device was predominant compared with other devices (P < 0.01).
  
  
  CONCLUSIONS
  Jackson intrasacral fixation system is an effective device for lumbosacral fixation.
authors.affiliation: Department of Spine Surgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
authors.forename: You-wen
authors.initials: YW
authors.lastname: Deng
authors.forename: Yong
authors.initials: Y
authors.lastname: Qiu
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D002417:Cattle; D005593:Fracture Fixation, Internal / Q000379:methods*; D006801:Humans; D016268:Internal Fixators; D008159:Lumbar Vertebrae / Q000601:surgery*; D008161:Lumbosacral Region; D012447:Sacrum / Q000601:surgery*