My wife has been fighting chronic bone infection in her right pelvis for 1 1/2 years. She does not have any prosthesis so your case is more difficult. Six months ago they finally found a antibiotic that dropped the blood markers into the normal range. They call it controlled but not cured. The infection doctor told her that she will probably be on antibiotics for another 2 years, It is really tough to kill a bone infection because of the lack of blood vessels in bones. Have they mentioned going in and debriefing the area and packing it will antibiotic beads. Any how hope all goes well with your rehab.
Don