My surgeon wants to do a fusion on L3-4 degenerative bone on bone disc. An artificial disc on L4-5 where I have a bulging disc. I've had a discogram done and L4-5 was a 10 out of 10. and L3-4 was a 7 out of 10. Has anyone had this surgery done. I've been off work for a year and the pain hasn't gotten better with conservative treatments. My doctor is Dr. Richard Kahmann in SB.