Implantable systems, devices and related methods

A method for performing spinal surgery comprising:

• preparing a disc space between a first vertebra and a second vertebrae;
• providing a surgical system to be implanted into the patient, the system including:
• a spacer having a first arm terminating at a first free end, a second arm terminating at a second free end, the first and second arms having an outer surface being convexly curved and a portion of the outer surface having a concave surface;
• a frame having a leading end, a trailing end, and a continuous perimeter that extends around the outside of the spacer and defining an outer surface and an inner surface, wherein the inner surface of the frame correspondingly engages with the outer surface of the spacer;
• and
• a fixation member insertable in the trailing end of the frame, wherein the fixation member is angled in an upward or downward direction,
• inserting the spacer into the frame;
• implanting the spacer and frame into the disc space;
• and
• delivering the fixation member to secure the spacer and the frame in the disc space.