Slashdot Mirror


Doctors Replace Patient's Thoracic Vertebrae With 3D-Printed Replica

ErnieKey (3766427) writes Earlier this month, surgeons at Zhejiang University in China performed a surgery to remove two damaged vertebrae from a 21-year-old patient. In their place they inserted a 3D printed titanium implant which was shaped to the exact size needed for the patient's body. The surgery, which took doctors much less time and provided significantly less risk [than conventional surgery] was completely successful and the patient is expected to make a full recovery. This is said to be the first ever surgery involving 3D printing vertebrae in order to replace a patient's thoracic vertebrae.

31 of 55 comments (clear)

  1. Source? by Anonymous Coward · · Score: 3, Insightful

    Source? References? Further information?
    What caused the damage? What is the "conventional surgery"?
    When did this happen?

  2. DMLS by DigiShaman · · Score: 1

    Direct Metal Laser Sintering. I had no idea you could do that with titanium! Pretty damn cool.

    --
    Life is not for the lazy.
    1. Re:DMLS by Tatarize · · Score: 1

      Other than mercury, what metal could conceivably have any kind of thing preventing it from being melted by a laser attaching to itself when it freezes again?

      --

      It is no longer uncommon to be uncommon.
    2. Re:DMLS by Jarik+C-Bol · · Score: 1

      That'd be fun also!

      --
      I've decided to Diversify my Holdings. I've divided my cash between my left and right pockets, instead of all in one.
    3. Re:DMLS by Immerman · · Score: 3, Insightful

      You could probably avoid that by sintering in an inert atmosphere, or in vacuum. In fact I would suspect high-end metal printers would do that anyway, in order to avoid the incorporation of oxides into the final product. After all virtually all metals "burn", lithium, etc. are just more volatile than most.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    4. Re:DMLS by Neil+Boekend · · Score: 1

      Bromine.

      For other reasons, none of the metals with a halflife of below a second would be advisable. Especially not for objects as large as this.

      If you want to get technical both mercury and bromine would work fine, assuming your 3d printer is in a freezer.

      Not that I would want an implant made of any of those metals.

      --
      Well, I might have a way, but it only works on a semi spherical planet in a vacuum.
    5. Re:DMLS by Tatarize · · Score: 1

      Bromine is a halogen, certainly not a metal.

      --

      It is no longer uncommon to be uncommon.
    6. Re:DMLS by Neil+Boekend · · Score: 1

      Oops.

      --
      Well, I might have a way, but it only works on a semi spherical planet in a vacuum.
  3. Re:How about replacing with an adamantium vertebra by CrankyFool · · Score: 2

    No. At present, our current knowledge of materials does not cover Adamantium. Basically, it's not actually a real material (to the best of our knowledge).

  4. This dude loves 3D printing news from 3dprint.com! by stastuffis · · Score: 1

    Source article Most of his submissions from there. Just sayin'.

  5. Re:timothy by Khyber · · Score: 5, Informative

    "3d printing with titanium?"

    NASA did it like last year, or year before that.

    Try keeping up with the pace of technology, luddite.

    ~Signed,
    Person with a 3-d printed titanium femur and 3-d printed plastic composite patella.

    --
    Still waiting on Serviscope_minor to wake up to fucking reality and realize that Jessica Price isn't going to fuck him.
  6. Re:This dude loves 3D printing news from 3dprint.c by Khyber · · Score: 3, Insightful

    Yep, he barely discusses anything and submits tons of stories from there.

    50:1 this guy's shilling for ad dollars.

    --
    Still waiting on Serviscope_minor to wake up to fucking reality and realize that Jessica Price isn't going to fuck him.
  7. No logical benefit from this by spineboy · · Score: 5, Informative

    I'm an orthopaedic surgeon, and I doubt it's anything more than just a typical spacer that is commonly used.

    OK found the article, and I'm corect.

    http://3dprint.com/30512/3d-pr...

    The title is misleading - it's just a 3D printed version of spacers that are commonly used - it really doesn't look, nor function any differently than the ones currently being used. The patient had a non-ossifying fibroma - rare in the spine, but benign, and will turn into regular bone eventually. This could have been treated with some bone graft and a plate and screws, which is basically what they did.

    Nothing really new here.

    --
    ..........FULL STOP.
    1. Re:No logical benefit from this by mlheur · · Score: 1

      Thank you very much for the reference and insight.

      I was quite curious how they could gotten the spinal cord into an artificial vertebra. I guess they could make it in two pieces and then combine the two pieces in place (screws?). I'm guessing that severing and reattaching the spinal cord itself isn't very feasible.

    2. Re:No logical benefit from this by davester666 · · Score: 1

      IT'S TOTALLY NEW. IT USED A 3D PRINTER, FROM THE FUTURE!!

      and now we bring you the rest of the internet.

      --
      Sleep your way to a whiter smile...date a dentist!
    3. Re:No logical benefit from this by AchilleTalon · · Score: 4, Funny

      It runs Linux, it is the year of Linux on the vertebrae!

      --
      Achille Talon
      Hop!
    4. Re:No logical benefit from this by mi · · Score: 1

      It seems like 3D printing will become the "on a smartphone" version of patents.

      Not until the loving, caring, and omniscient folks at the FDA approve. And each would-be "app" will need a separate approval, of course.

      --
      In Soviet Washington the swamp drains you.
  8. Howto ? by jalet · · Score: 1

    Please could someone explain to me how you put the vertebra around the spinal cord once the vertebra has been "printed" ? I think you can't cut the spinal cord, so how do you do this ?

    --
    Votez ecolo : Chiez dans l'urne !
    1. Re:Howto ? by Anonymous Coward · · Score: 1

      Have a look at the photos at http://3dprint.com/30512/3d-printed-thoracic-vertebrae/ and see what their 3d printed vertebra actually is.

    2. Re:Howto ? by wierd_w · · Score: 1

      And here I was thinking it was like something out of aeon flux...

      https://www.youtube.com/watch?...

  9. Re:How about replacing with an adamantium vertebra by peragrin · · Score: 1

    True but you wouldn't want to either. You need your bones the way they are, it is tough to get ligaments to grow and attach to metal. Without ligaments your muscles don't have anything to anchor too.

    --
    i thought once I was found, but it was only a dream.
  10. bad summary, no links? by ihtoit · · Score: 1

    Citations needed, as they say.

    Also, 3-D printed titanium? Have we skipped ahead a century or so?

    --
    Political debates have me rolling my eyes so much I think I got optical whiplash. I should sue. - Foamy The Squirrel
    1. Re:bad summary, no links? by serviscope_minor · · Score: 1

      Also, 3-D printed titanium? Have we skipped ahead a century or so?

      No. If you have a cool million or so to drop on a 3 printer, you can print with a variety of metals in very high precision, including titanium and hardened steel.

      For example, here is a 3D printed gun:

      https://www.solidconcepts.com/...

      You can print all sorts of stuff.

      --
      SJW n. One who posts facts.
    2. Re:bad summary, no links? by Immerman · · Score: 1

      Titanium printing has been around for years (someone above even claims a couple of decades) - we're talking the high-end laser sintering machines and related technology, not the johnny-come-lately cheap plastic extrusion crap. Those are essentially just toy versions of a concept pioneered much earlier.

      Among the things that can now be 3D printed:
      Various resins - I think these were actually the first to the party, and they've gotten rather advanced in a variety of different configurations.
      Titanium
      High temperature ceramics
      Living cells (and assorted artificial intercellular matrices) - various medical researchers are working on being able to print viable replacement organs and body parts, as I recall they've already had fairly decent success with relatively simple things like bladders and ears

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
  11. Re:Trust me I know. by Anonymous Coward · · Score: 1

    Idle speculation here, but in cases of severe intractable pain is it possible to ablate the spinothalamic tract? This is the pathway in the spinal cord that carries pain signals.
    http://en.m.wikipedia.org/wiki...

    It seems conceptually feasible and would theoretically result in permanent loss of pain and temperature sensation in the affected regions, while leaving discriminatory touch sensation intact.

    Looks like someone else already had this idea...
    http://www.ncbi.nlm.nih.gov/m/...

    It seems like focal destruction of the anterior white commissure would be fairly specific in terms of eliminating pain and temperature sensation without loss of other function.

  12. Re:Trust me I know. by Ol+Olsoc · · Score: 1

    These types of surgeries usually end with more pain than you had going in.

    Ouch!

    Anyhow, if you look at what they made, it is a lot less nasty than some of the older methods. Essentially they put a stabilizing "wrap" around the vertabrae. The headlines are misleading. It looks like a good solution to her particular problem, as it sounded like she was ready to hang it up.

    All that being said, surgery has come a long way, and I can see some of the 3-d work being of great use. As a for instance, my Wife had "mommy thumb" which is where the cartilage wears away at the base of the thumb. Pretty common in women. She would be doing whatever she was doing, and some random movement would scrape the bone against the nerve, and it was like a very painful shock.

    Anyhow, the traditional treatment is fusing the joint, which eliminates the pain, and the movement. Now there is an operation where they remove the affected bone, take half of one of the tendons above the wrist (split lengthwise, and somehow wrap that around the nerve, making a new joint. It's like magic, she went from excruciating pain to just about nothing, and she has full use of the thumb. The tradeoff was that the immobilized thumb was instantaneous relief, and she had a a couple months of PT after allowing the new joint to heal. But the immobilized thumb was not of a lot of use. 3-D printing might make this procedure even better

    I know you said you'll not allow them to touch you again, but some medical advances recently, plus some research on your part (as opposed to doctors, who are going to bring their own suppositions and often "this is the way I've always done it") might be able to get you some relief for your problem.

    --
    The shepherds did so well protecting the flock that the sheep no longer believed that wolves existed.
  13. Re:timothy by ArcadeMan · · Score: 1

    Signed,
    Pantsless Pedant

    In any difference of opinion, pants always beats no pants. - Jerry Seinfeld

  14. Re:How about replacing with an adamantium vertebra by PRMan · · Score: 1

    No, you have to pour it in as it's molten hot because once it cools, you're not doing anything to it. That's why you need a mutant with healing powers...

    Wait! What were we talking about?

    --
    Peter predicted that you would "deliberately forget" creation 2000 years ago...
  15. Re:timothy by Immerman · · Score: 1

    Are you sure?

    My opinion is that the women's olympics should return to it's roots and be performed in the nude. Heck, the men's too, wouldn't want the female spectators to feel left out.

    --
    --- Most topics have many sides worth arguing, allow me to take one opposite you.
  16. Re:Printing Bone by craighansen · · Score: 1

    Think it will ever be possible to 3D print bone that has a genetic match for the person it was printed for? Kinda like in 5th Element, where the fluorescent green ooze made the bones of the supreme being.

    It might be feasible to use bone granules as already used in bone grafts, along with some kind of glue matrix to hold it in place. What's not obvious is the choice of material for the glue matrix that is biocompatible with bone healing and providing sufficient material strength until replaced wih new bone growth. My understanding of the current state of the art involves splinting until the bone granules heal together, or, for example, using these bone granules in jawbone to build up bone prior to installing dental implants after the bone graft heals - in these cases, the bone isn't structurally sound until it heals. I personally had a surgeon graft bone material from my hip into my knee to repair a tibia plateau fracture, but that also included two three-inch screws to hold everything in place - and it took quite some time before the bone was full strength.

    It'll be a long time before 3D printers place individual atoms/molecules in place to build material that's a genetic match while printing bone structure.

  17. Re:timothy by Immerman · · Score: 1

    The same as every time - I rarely proofread forum posts more than a skim, and homophones slip through when I'm typing several sentences behind my thoughts.

    And yes, I can count - my thoughts are simply more voluminous than my "prose". And I suppose it means that I don't care enough about the good opinion of "grammar nazis" to waste attention on the details of a throwaway joke. Anyone who comes to an internet board looking for flawless spelling and grammar is clearly just looking to spar. Which I can respect, except that you're being unpleasantly rude.

    So, what's your excuse? If you actually want to alter people's behavior rudeness is rarely the most effective approach.

    --
    --- Most topics have many sides worth arguing, allow me to take one opposite you.