Why didn't the surgeon use instrumentation to maximize the the outcome of the fusion? When I had my first cage installed back in............maybe '97....the surgeon did not use anything to support the position of the cage while fusion was supposed to be taking place. I obeyed instructions to the letter. At approx 3 mos. post op, I was in more pain than I was pre op. It turned out that the cage had tilted forward and rotated. The revision was worse than the original surgery.