SPINAL FUSION SYSTEM AND SPINAL FUSION INSTRUMENT ADAPTER USED THEREIN

摘要

A spinal fusion instrument adapter includes: an engaging portion protruding downward to engage with an engaged portion of a bone engagement member; and a restricting portion extending upward from the engaging portion and configured to, in a state where the engaging portion engages with the engaged portion of the bone engagement member in an accommodating portion of a head portion, directly or indirectly contacts an inner wall of the head portion to restrict three dimensional swinging motion of the bone engagement member, which is integrated with the spinal fusion instrument adapter.