Growth Plate Fracture cast or splint?

I was hiking on wednesday and I tripped on a rock a hurt my ankle. I went to the hospital and they took x-rays and such. It wasn't broken per-se but the P.A. at the express clinic in the er said because of where it was tender, bruised and swollen that I may have a growth plate fracture. She refered me to an orthopedist. In the meanwhile i was given a posterior splint and crutches. I go to the orthopedist on monday afternoon. Do you think he will put me in a cast? or will I stay in a splint?