Spinal bone fusion system

A spinal bone fusion system comprising:

• an intervertebral cage including:
• a top wall, a bottom wall, a first side wall, and a second side wall defining a bone product placement space, the intervertebral cage defining a first vertebral body facing surface and a second vertebral body facing surface opposite the first vertebral body facing surface;
• a first integral screw guide extending through the top wall of the intervertebral cage, the first integral screw guide having a first predetermined angle;
• a second integral screw guide extending through the top wall of the intervertebral cage, the second integral screw guide having a second predetermined angle;
• and
• at least one first indentation formed at least partially in a top surface of the top wall of the intervertebral cage between the first integral screw guide and the second integral screw guide;
• a first screw member configured to be disposed in the first integral screw guide at the first predetermined angle and at least partially within the intervertebral cage, the first screw member extending from a first entry opening formed in the top surface of the top wall of the intervertebral cage to a first exit opening formed at least partially in a bottom surface of the top wall of the intervertebral cage and at least partially in the first vertebral body facing surface;
• a second screw member configured to be disposed in the second integral screw guide at the second predetermined angle and at least partially within the intervertebral cage, the second screw member extending from a second entry opening formed in the top surface of the top wall of the intervertebral cage to a second exit opening formed at least partially in the bottom surface of the top wall of the intervertebral cage and at least partially in the second vertebral body facing surface;
• and
• a screw locking mechanism configured to secure at least one of the first screw member and the second screw member in one of the first integral screw guide and the second integral screw guide, the screw locking mechanism comprising a flat cover portion and a coupling portion extending from the flat cover portion, the flat cover portion configured to only partially extend over a portion of an opening of the first integral screw guide or a portion of an opening of the second integral screw guide when the screw locking mechanism is in a locked position and coupled to the intervertebral cage by the coupling portion,
• wherein the coupling portion of the screw locking mechanism engages the at least one first indentation formed at least partially in the top surface of the top wall of the intervertebral cage between the first integral screw guide and the second integral screw guide,
• wherein each of the first integral screw guide and the second integral screw guide is angled to orient the first screw member and the second screw bi-directionally in opposite directions,
• wherein the first screw member includes a screw head and a threaded body,
• wherein the second screw member includes a screw head and a threaded body;
• and
• wherein, in the locked position, a length of the flat cover portion in a direction from the first side wall to the second side wall is smaller than a distance measured from a center point of the first entry opening to a center point of the second entry opening.