this post was submitted on 10 Jan 2025
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Weird News - Things that make you go 'hmmm'
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There is a reason why the request "remove all metal items you may have on you" is done before starting the exam.
I've seen people with old teeth fillings being rejected because the machine can pull it straight out of your mouth.
Yikes! So, like, what if an MRI is medically necessary for those people? Do they have to schedule a dental appointment first to remove/replace those fillings? Genuinely curious now that you've mentioned that because fillings were not something I ever thought about with regard to MRI safety.
Remember those black filling pastes dentists used to use? Some had metal in it. Modern ones are safe, as those materials were phased out, deemed unsafe. Most stable countries have done this but in some parts of the world it is still possible to have those older fillings in use.
And, yes, I've seen people strongly avised to have their cavities reviewed before undergoing MRI exams. The metalic filling are, according to what I was explained, dangerous by two different reasons: the filling can be physically pulled from the teeth, causing severe trauma, but the metal can heat up inside the mouth and cause severe burns.
That's weird. I've had MRIs and I have old silver fillings. Didn't have an issue.
silver isn't magnetic
I know, which is why I was questioning the OP saying the old silver fillings are getting torn out of people's mouths.
Silver is not supposed to react to magnetic fields.
From personal examples, I can cite my father and two uncles, all of which had to check their teeth before undergoing MRIs.
Professionally, I worked in a medical engineering company for thee years and it was one of the most stressed safety points I would hear, when the engineers delivered these machines.
Better safe than sorry.