Question on scoliosis...?

I have three curves in my spine: a 40 degree curve in my upper back, a 20-30 degree curve in the middle, and a less than 20 degree curve in my lower back. My doctor says that my growth is almost done, but I'm still worried I might need surgery. I wanted to know if there were any other methods besides surgery to slow down scoliosis? I know it can't be cured.