A needle was broken during root canal therapy. Now because of illness, I have to have a magnetic resonance examination every once in a while. Does it affect you?

Whether to take it out or not depends mainly on whether the root filling can be completed. Actually, it has little effect on MRI. If the root filling can be completed, there is no need to take it out. However, the broken needles are generally in the middle and lower part of the root canal, so it is extremely difficult to complete them perfectly. If it can't be filled correctly, the root tip of teeth is prone to chronic inflammation. So I suggest taking it out. Your skills in Huaxi, Sichuan are quite good. It is possible to take out the broken needle and you are fully capable.