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Objective: To investigate the effect of pulse radiofrequency(PRF)on pain behavior,and current densities,kinetic properties of voltage-gated sodium channels(VGSC)in dorsal root ganglion(DRG)neurons in rats.Methods: 63 male SD rats weighing 60-80g were randomly divided into 3 groups: control group,sham group,PRF group(each n=21).