Stability of Injured Spine in Relation to Bending Loads under Conditions of Transpedicular Osteosynthesis (Experimental Study)

Study of T9—L3 spinal segment blocks using anatomic preparations has showed that in instable injury of T12 the rigidity of T11—L1 segments under conditions of transpedicular osteosynthesis with four screws spinal system is on average 25% and 14.7% lower than the normal rigidity of the intact T11—L1 segments in relation to bending kyphotic loads and lateral bending loads, respectively. The rigidity of synthesized spinal segments to lateral bending loads is 1.9 times lower than the rigidity to sagittal bending loads. With use of metalwork the rigidity indices of the synthesized spinal segments are on average 1.2 times higher as compared with the rigidity of the intact spine.