I have had 5 back surgeries. My 4th one I had was a fusion on L4, L5, S1,& S2 with rods and screws back in 2001. In 2010 I had the rods and screws removed because they had moved a little and were causing me problems. Now I have been noticing that anytime I shift myself in a chair or move myself in a different position u can hear my back cracking or hear and feel it shifting in the area that is fused. Is this normal? Can a fusion crack or break apart?
Any information on this would be greatly appreciated.