Hi there
Normally before performing MRI scans, the radiology department will ask about recent operations and the possibility of metal work. In general, if metal has been in the body for a while and is in a deep tissue structure, such as the knee, it should not cause too much bother.
That said, in a situation such as yours, it might be worth consulting your dental/maxfax surgeon before undergoing the scan, in case they have concerns.
Hope this helps.
BW
Dr Dinesh
