How Log Does It Take for the Tissue to Repair Itself After Removal of Buttock Implants?

I had implants placed in my buttox on the 18th of January this year,and I got a fever and chills about 1 week post op. my doc had me going back to the office every two days to check but led me to believe things were ok. 4 weeks post op he tells me there must be an infection and he has to go in and look, when I woke up they took my implants :( my butt is smaller then before the implants, it is virtually flat. Will the old tissue or fat grow back or am I stuck like this unless I get another aug?