Problems?
So I want to implant a M31 magnet into my ring finger (i wont be doing it , leaving to for an experienced person) and i hope someone can give me answers about the risks apart from MRI , and its not only about the risks , i hope you can give me cases of problems (i mean problems like permanent damage , or even death) that i can work with , because if we want to prove something is safe , lets first try to prove its not , if we cant prove it , its probobly safe. my main worries is for it to get into my bloodstream if it breaks , however since it is protected in TiN im not really worried.
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In the case of broken magnets, it has happened. Improperly coated magnets also cause similar problems. Neodymium is a tissue irritant and can cause swelling and discomfort. In large doses (far larger than you've ever get from magnet implants), it can cause liver damage. Boron is nontoxic in the amounts in a magnet implant. Same deal with the iron in them. Dependent on what undercoat, if any, is below the TiN, there exists some other small risks. Nickel is not well tolerated by some people (myself, for example) and if there's a layer of that below the TiN (I do not know that to be the case with the M31s, but then again, nickel coatings are common on NdFeB magnets and for all I know, there's a layer or two of that below the TiN).
There's also the risks associated infection. Typically, proper aftercare avoids that. Maybe a risk of excessive blood loss if you hit an artery or something, but I've never heard of anyone having any close calls related to blood loss. The flexible NFC implant I did a short while back bled WAY more than a magnet implant and I didn't have any issues related to that.
The ultimate take-away here is that, yes, there are some risks, but literally thousands of magnets have been implanted in humans over the years and absolutely no one has died or had a major health problem occur because of one.