Fig. 4From: Finite element analysis of different configurations of fully threaded cannulated screw in the treatment of unstable femoral neck fracturesStress distribution in five fixation configurations. a Triangular model. b Inverted triangular model. c Triangle with anterior single screw. d Triangle with posterior single screw. e Vertical model. Stresses appeared to be concentrated in the middle surface of the screw near the fracture line of each groupBack to article page