The reason these specialists re-do RC is that there is alot of money to be made. In my own research, I believe it. I put in about 2,000 on one tooth that did not hold up and got infected anyway. The infections can't be treated deep within those canals, they just don't tell you that. My own dentist, told me that as well as Bryanna. I had mine out, end of pain, end of problem, end of the money drain which really made me upset. I have a partial now and am happy to be back in shape. Best choice I ever made. I wish the professionals would be honest, but I have not found that to be what they do. ginnie