I had 18" at TI resected in 1990. Mine was emergent so it was not a decision I had to make. I can't tell you how my CD meds/care changed before and surgery, as I was not diagnosed (or even considered I had a problem) before I ruptured.
I can say that I went from constipation since age 5 to D after the surgery (makes sense, the narrowing was removed). I went for many years without any major care---1990 to 2002 I only had three flares big enough to put me on prednisone and they were short bouts of pred. In 2002, I had my first fistula experience. Other than the fistula and a recent flare due to not taking my meds, I have been in what you could call remission.
I have issues beyond the TI that have gotten worse over the years, but I would say the surgery was very helpful FOR ME. I hope this helps those who have to decide on surgery or no, but it is so personal a situation.
Dx'd '90 (emergency rupture), symptoms ignored long before that, '03 fistulas and bad flagyl reactions, B12 weekly, Pentasa [until I surrender to the bigger meds]
I'm riding on the escalator of life....