FIXATION APPARATUS AND METHOD OF COMBINED ANTERIOR AND POSTERIOR ATLAS-AXIAL SPINE FUSION IN FRACTURE DISLOCATIONS OF C-C VERTEBRAS Russian patent published in 2010 - IPC A61B17/56 A61B17/70 

FIELD: medicine.

SUBSTANCE: apparatus is fixed on bone structures with contact heating. The apparatus comprises a plate with upper grippers, arms and a flange. The upper grippers represent two open rings pulled apart in their tops; there is a notch formed between their bases in a plate to bring a posterior C₁ pedicle under the posterior tubercle. The plate arms are turned backwards and extend in legs directed downwards. The hooks bent towards each other are located on the ends of the legs. The flange starts from the bottom of the plate, is opposed to the notch and has a segment bent forward, and then a segment bent backwards and downwards to the convergence of the hooks. The flange length is 2/3 of the leg length. The method involves the anterior decompression of the spinal cord by a transpharyngeal approach with the removal of a compression substrate and the anterior spinal fusion of C₁-C₂ vertebras with the insertion of a porous memory implant, as well as the posterior atlas-axial spinal fusion with the application of the stabilisation memory apparatus. The posterior decompression of the spinal cord involves the creation of a groove in a base of the spinous process of C₂ vertebra. The aforementioned apparatus is cooled to -5°C with a coolant, the upper ring grippers and leg hooks are unbend; the flange is bend backwards. The apparatus is transferred to a wound and fixed; therefor, the upper ring grippers are brought behind the atlas pedicle, and the hooks are brought under the spinous process of C₂ vertebra. The flange is inserted into the groove. By contact heating, the apparatus is fixed on bone structures. The combination of the anterior porous implant spinal fusion by the transpharyngeal approach and the posterior atlas-axial fixation with using the apparatus described above enables the treatment of complicated acute and chronic fracture dislocations of C₁-C₂ vertebras. First of all, the anterior decompression is performed to the extraction of a bone fragment negatively affecting the spinal cord, the dislocation reposition and anterior spinal fusion; the posterior spinal fusion of C₁-C₂ vertebras with using the declared apparatus is performed secondarily.

EFFECT: more reliable and durable stabilisation, possibility to avoid the external stabilisation.

2 cl, 9 dwg, 1 ex