Can Collagen Injections be removed from the lips?

I have had collagen injected to my lips. I am not sure what type of collagen it was, but the lady who did it said that it is permanent. So I guess it is one of the synthetic ones. I would like to remove it from my lips. Is it possible? Will I have to have the same procedure of cutting the lips open, as it is done with silicone removal? Or is there some other way? I also heard about Ultherapy, which can help with bad silicone injections. Does it apply to my case?