Are solid silicone butt implants toxic in the body?

There's a thing called silicone breast illness. A lot of women say they developed autoimmune disorders even from saline implants because they have a silicone shell. I'm wondering if the heat inside the body will make the particles of the solid silicone butt implant go in the blood stream or something. Even though they are solid can microscopic parts of the silicone be toxic due to the temp in the body being so hot?