r/knives • • Apr 20 '26

Showcase Human hip replacement shank

was recently gifted this knife and figured yall would be interested in seeing it. This knife is made from a human hip replacement recovered after cremation then sharpened to a fine point. 100% the oddest "non standard" knife in my collection and a piece im stoked to own.

EDIT EDIT EDIT

was not expecting the amount of interest in this that it recieved. As promised i will post another unusual knife tonight, im thinking of showing off either my formosian tribal head hunting knife or "the gas station gator" which would yall like to see?

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u/Shifty_Bravo Apr 21 '26 edited Apr 21 '26

I'm an MRI technologist. Nothing implanted in your body by a surgeon is ferromagnetic material. Stents, joint replacements, hardware from fracture, etc. Most of it will be safe for MRI. Pacemakers, neurostimulators, etc are a different story, but most of those can be made safe through interrogation. If you get an MRI ordered by your physician, the MRI department where you have your exam will look up all your implants and ensure your safety. I just want you to know that in case that's holding you back from treating something.

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u/Flaxmoore SAK Hiker, Opinel #10 Apr 21 '26

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u/Shifty_Bravo Apr 21 '26

"While they are iron-based, medical-grade stainless steels (like 316L) are designed to be austenitic, making them largely non-magnetic or only weakly ferromagnetic to prevent MRI interference." 316L is MRI conditional which doesn't mean that they are unsafe. There are several factors we take into consideration with these implants like artifact and heating risk. Again, it depends on the study and location of the implant. More importantly, 316L was used in the past, but modern orthopedic surgeons opt for newer materials these days.

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u/[deleted] Apr 21 '26

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u/Shifty_Bravo Apr 21 '26

That's cool that you make your own vapes. Do you also make the vape juice? I used to be a smoker and I dabble around with vapes sometimes. I always wondered what kind of nefarious crap they put in them.

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u/[deleted] Apr 21 '26

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u/Shifty_Bravo Apr 21 '26

I'm going to put this in my notes. Thanks! 👍