Insertion instruments

The insertion instrument (10) for inserting a modular intervertebral fusion device or components thereof into an inter-vertebral space comprises at least one superior (arm 16), (18) mounted on a superior support (12) such that the at least one superior arm extends from the superior support. The insertion instrument further comprises at least one inferior arm (20), (22) mounted on an inferior support (14) such that the at least one inferior arm extends from the inferior support. The superior and inferior supports (12), (14) are mechanically coupled to each other whereby: the at least one superior arm (16), (18) and the at least one inferior arm (20), (22) extend in generally a same direction such that, in use, each of the distal ends of the superior and inferior arms engage at a respective location on a modular intervertebral fusion device or component thereof; and the superior and inferior supports (12), (14) rotate relative to each other to provide relative rotation of: the at least one superior arm; and the at least one inferior arm, whereby there is movement together and apart of the at least one superior arm and the at least one inferior arm at their distal ends. One of: the at least one superior arm (16), (18); and the at least one inferior arm (20), (22) is unarticulated between its distal end and the respective superior or inferior support (12), (14). The other one of: the at least one superior arm (16), (18); and the at least one inferior arm (20), (22) comprises a hinge (32) between its distal end and the respective superior or inferior support. The hinge (32) rotates the distal end of the other one of the superior arm and the inferior arm towards or away from the one of the superior arm and the inferior arm.