Which are the side effects of PMMA butt augmentations after 1 year?

Injecting anything other than Fat carries far too much risk.  We have all heard multiple national stories were patients died from complications.  It is not something recommended by our society of the American Board of plastic surgeons. 2 Thumbs down.

Neither will pills, or other types of "snake oil!" Buttock implants and fat grafting are the ONLY safe and appropriate ways to enlarge your buttocks. Autologous flaps of a patient's own tissues can also be used as a patient undergoes a belt lift or lower body lift.

Fillers or surgery prescribed by a board certified plastic surgeon can reshape your body, but pills and creams will never have any affect. The best case scenario is that any creams you might have bought do nothing, but there are many out there that severely damage skin. The only way to shape ...

Unfortunately, there may not be any surgeons willing to help with this because of the scarring and deformity that is caused when removing it. Since it travels into the body, it is impossible to remove it all. People do not think of this part of it when they are having these dangerous substances...

What exactly did you have injected?  Fat or a non FDA approved substance?  You should talk to the Dr. or person who did the injections.  Good Luck...