Fig. 2From: Conventional versus helical blade screw insertion following the removal of the femoral head screw: a biomechanical evaluation using trochanteric gamma 3 locking nail versus PFN antirotationA, B Experiment for assessing the pullout strength of conventional- and helical blade-type hip screws. C, D Experiment for assessing the rotational strength of conventional- and helical blade-type hip screwsBack to article page