Teeth wiggling after crowns were placed with permanent cement.

After having 2 crowns placed with permanent cement,2 days later if I touched them they would hurt alot and then they became loose.i could wiggle them side to side with little pressure.went back to the dual certified prosidontis/periodontist and said theirs no infection and they were solid before,during prep and after placing the crowns.so what's causing this.btw the pain has subsided but I can still wiggle them