Biomechanical comparability of transdiscal fixation and posterior fixation with and with out transforaminal lumbar interbody fusion within the therapy of L5-S1 lumbosacral joint.
Proc Inst Mech Eng H. 2018 Feb 01;:954411918760959
Authors: Özalp ?H, Özkaya M, Yaman O, Demir T
Transdiscal screw fixation is mostly carried out within the therapy of high-grade L5-S1 spondylolisthesis. The primary considered the research is that the biomechanical performances of the transdiscal pedicle screw fixation will be similar to plain posterior pedicle screw fixations with or with out transforaminal lumbar interbody fusion cage insertion. Lumbosacral parts and pelvises of 45 wholesome lambs’ vertebrae have been dissected. Animal cadavers have been randomly and equally divided into three teams for instrumentation. Three fixation methods, L5-S1 posterior pedicle screw fixation, L5-S1 posterior pedicle screw fixation with transforaminal lumbar interbody fusion cage insertion, and L5-S1 transdiscal pedicle screw fixation, have been generated. Axial compression, flexion, and torsion assessments have been carried out on take a look at samples of every system. In axial compression, L5-S1 transdiscal fixation was much less stiff than L5-S1 posterior pedicle screw fixation with transforaminal lumbar interbody fusion cage insertion. There have been no important variations between teams in flexion. Moreover, L5-S1 posterior fixation was stiffest underneath torsional masses. When axial compression and flexion masses are considered, transdiscal fixation will be alternatively used as an alternative of posterior pedicle screw fixation within the therapy of L5-S1 spondylolisthesis as a result of it satisfies sufficient stability. Nevertheless, in torsion, posterior fixation is proven as a greater possibility on account of its larger stiffness.
PMID: 29475413 [PubMed – as supplied by publisher]