An Experimental Study of a Combination Method Using a Pedicle Screw and Laminar Hook for the Osteoporotic Spine

Abstract

Instrumentation stiffness obtained by the combination method was significantly greater than that obtained by the use of pedicle screw alone. There was no significant correlation between the improvement ratio by the combination method and bone mineral density. These results suggest that the combination method is valuable irrespective of the presence of spinal osteoporosis.