I had a rt THR which dislocated in the hospital, i believe when i was transferred from OR bed to my room. I was never able to bear weight on it. Post revision cultures showed MRSA and non aureus staph infs. I went on IV vancomycin. 2 weeks later my incision cultures pos for Klebsiella. Now i have a medicated spacer, IV vznco, and oral Levaquin. I'm being told that once im clear of infections, i have one more chance at a permanent THR. Why?