The real issue is that it sounds like your implants are broken (i.e. ruptured) and should be replaced. Depending upon the age of the implants, Mentor will at least replace the implants. They may even contribute towards your surgery.
As far as we know, silicone in biologically inert and has not been linked to disease or cancer. Migrating silicone can cause small lumps. These lumps usually appear in the lateral part of the breast heading up toward the underarm area (which is where the lymph nodes are located).