European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
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To characterize in vivo the transpedicular approach (TA) as an alternative route to study intervertebral disc (IVD) regeneration strategies in a sheep model. ⋯ TA is feasible in vivo, repeatable after only a short learning period and safely performed without significant morbidity. This animal model allows the study of IVD degeneration physiopathology and investigation of IVD regeneration techniques in vivo.
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Spondylolisthesis surgical treatment is often difficult with higher degree of slip and related techniques still debated. We have taken into consideration double thread recoil Schanz screws. This system should allow the best reduction of the slip, treating only the affected vertebrae. ⋯ Fixation system with Schanz screws seems to be effective in reducing the slip, treating only the affected level, in high grade of spondylolisthesis.