I have an end ileo.
It would be permanent. But I didn't have my rectum removed.
Just sewn from the inside. My surgeon did it that way in case I wanted another J pouch made and hooked up.
Which I don't. And I won't have my rectum removed as it causes no problems. And I do not want more surgery.
It's definitely a permanent ileo if you have the rectum removed and all of it sewn up.
It's an option to discuss with the surgeon.
Most have the rectum removed. As I read here and UOAA site.
Richard.
P. S.
I consider mine permanent.