[Biomechanical comparative study of lumbosacral fixation and Jackson intrasacral fixation].
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.
Deng
You-wen
YW
Department of Spine Surgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
Qiu
Yong
Y
Wang
Bing
B
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*