I have been managing my CD with diet and pentassa alone since 2007 and have not had one flare or symptom since changing my diet to the SCD diet.
I was diagnosed in 2007 with fistulizing CD after having two massive rectal fistulas. My GI wanted me to go remacade because he said that thi is the only way to heal fistulas as large as I had. I opted instead to try a more conservative approach first before turning of my immune system. I changed my diet to the SCD diet and went on pentassa. After 8 months of fanatical 100% adhesion to the diet, both fistulas healed up completely and all my symptons of CD were totally gone. To this day I still follow the diet, but not as strict as before, and I still take pentassa , and I am in complete remission. A colonoscopy a few years ago showed no active CD in my system anywhere.
I suggest reading the book "Breaking the Vicious Cycle" which is about the SCD diet. YOu have nothing to loose by trying it, and all to gain if it works for you.