now be rotated in the side to side direction and in the front to back direction to place the entry point for guide pin 504 insertion at a location of the surgeon 39 s choosing while maintaining the alignment of the drill guide 1208 with the fixation screwhole 914 in the modified fusion cage 904 fig1 e and 17f show this movement in the side to side direction in fig1 e the articulating drill targeting device 1204 is rotated to the left side to select an entry point 1704 in fig1 f the articulating drill targeting device 1204 is rotated to the right side to select a different entry point 1708 at either entry point the drill guide 1208 remains precisely aligned with the fixation screwhole 914 fig1 g and 17h show movement in the front to back direction in fig1 e the articulating drill targeting device 1204 has been rotated to the front in fig1 h the articulating drill targeting device 1204 has been rotated to the back rotation in this front to back direction is carried out simultaneously with rotation in the side to side direction in order to place the drill guide 1208 at the entry point of the surgeon 39 s choosing in fig1 e the drill guide 1208 has been slid down against the bone at the chosen entry point 1704 and is held locked in.