There is no direct chemical intereaction between the Silicone you had and a new filler such as Juvederm or Restylane if it were injected. The Silicone is permanent and the hyaluronic acids just mentioned are temporary. There can be, and I have seen a reaction, of Silicone years later after the tissues near it are traumatized. There could be a disturbance of a biofilm and potential infection when a minimally invasive procedure such as injecitons are done near the prior Silicone. This is a theoretical concern. If you have the new filler, and you see months or even years later, a tender bump form, it could be the Silicone reacting, or a delayed response to the hyaluronic acid, but this would be very rare.