Last year i had my 13th & 14th spinal surgeries due to screws coming loose. The top 4 screws now have bone cement. I have been slowly gaining back the use of my legs and arms and walking without aids. One month ago I began to have a squeaking/rubbing sensation in chest/upper back with some very sharp pains on occasion. Sometimes it feels heavy and aching in center of chest. There are no heart problems. Has anyone else had any experience like this. I am fused from T3 to S1 with rods and screws. I’m afraid it is coming apart again. Can the cement come out and cause further damage?