HMM, you had BMP used when your fusion was done.
Have you had any CT scans done to see if there is overgrowth of that could be causing your pain?
Complications of BMP use is overgrowth of bone that presses on nerves or wraps around the nerves. Documented by the FDA.
It could be that the artificial disc is pressing on nerves as well.
I also know of the laws in Illinois on WC, but also know that you can push to have another opinion done, especially with complications such as yours.
I know someone that had to fight it to be done, refused to close the WC case and found a doctor that has experience with BMP and has done research on it as well.
She was able to get WC to approve the second opinion and then subsequently had 2 surgeries to fix her problem that was caused by BMP.
You should push to have the WC approve another opinion. You should not have to suffer like this.
Fran