I had C1/C2 neck fusion about 1 1/2 years ago. I just found out that the 2 top screws are broken. Could this have been caused by faulty screws? A fusion that didn't "take"? Or is it possible they will not cause harm and the fusion is still technically be "successful". Would love to hear if anyone has experienced something like this. I had a CT scan and am awaiting the results now, but I am trying to do my own research as well. Thanks!