caput articularis
1.Methods: We apply positive and lateral X_ray to location before operation,to cut a 1.5 cm littler scarf on the mid_back of the lumbar under the local anaesthesia or light peridural anaesthesia,to put the endoscope into the scarf we use the self_made mimi_bony knife to cut the part of lamina,hyperplasia cohesive caput articularis,pachynsis ligamenta flava,hemiated discs organism,calcificated posterior longitudinal ligament,And absolutely relax the dural and nerve root.
