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[Biomechanical comparative study of lumbosacral fixation and Jackson intrasacral fixation]
You-wen Deng1, Yong Qiu, Bing Wang
1Department of Spine Surgery, Second Xiangya Hospital, Central South University, Changsha 410011, China.
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).
Conclusion:
Jackson intrasacral fixation system is an effective device for lumbosacral fixation.