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83-Year-Old Woman Gets New 3D-Printed Titanium Jaw

arnodf writes "The University of Hasselt (in Belgium) announced today (Google translation of Dutch original) that Belgian and Dutch scientists have successfully replaced an 83-year-old woman's lower jaw with a 3D-printed model. According to the researchers, 'It is the first custom-made implant in the world to replace an entire lower jaw. ... The 3D printer prints titanium powder layer by layer, while a computer controlled laser ensures that the correct particles are fused together. Using 3D printing technology, less materials are needed and the production time is much shorter than traditional manufacturing. The artificial jaw is slightly heavier than a natural jaw, but the patient can easily get used to it."

31 of 121 comments (clear)

  1. Don't Draw that Jaw by Anonymous Coward · · Score: 5, Funny

    You wouldn't download a jaw...

  2. Sweet! by tsotha · · Score: 4, Funny

    She can get a job as a heavy at Drax Industries.

  3. Any day now... by ackthpt · · Score: 2

    I'm going to be reading how someone using a 3D printer is creating their own family.

    oooooh and is the Pope going to have kittens!

    --

    A feeling of having made the same mistake before: Deja Foobar
  4. How do they attach muscle/tendons to titanium? by vyvepe · · Score: 5, Interesting

    How do they attach muscle/tendons to titanium?

    1. Re:How do they attach muscle/tendons to titanium? by Anonymous Coward · · Score: 5, Interesting

      From what I understand of the jaws anatomy, it's essentially cradled inside a basket of muscles, those allow it to open/close. The tendon attachment, however, is tricky, as titanium forms a bond with bone (which grows around it) and not with tendons or ligaments.

    2. Re:How do they attach muscle/tendons to titanium? by CharlyFoxtrot · · Score: 5, Informative

      There some more information in the university's press release which, handily, is also available in English translation :

      "The implant was coated with plasma sprayed artificial bone (hydroxy-apatite bone substitute compound) by Cambioceramics, Leiden, The Netherlands. Some anatomical parts, such as the condylar heads and the rims for the mandibular nerves were polished."

      So I assume they attach the tendons to the faux-bone.

      --
      If all else fails, immortality can always be assured by spectacular error.
  5. Glad I'm not her husband by ozduo · · Score: 2

    If she wore out her old jaw nagging her old man, how many nags will it take to wear out a titanium one!

    --
    I got to the chocolate box before you, that's why the hard ones have teeth marks.
    1. Re:Glad I'm not her husband by iggymanz · · Score: 2

      or did they live any capp style and he wore out her jaw popping her one in the yap? this titanium jaw would be hell on the knuckles....

  6. Experience by TWX · · Score: 4, Funny

    The artificial jaw is slightly heavier than a natural jaw, but the patient can easily get used to it.

    Sounds like the whole thing is a jaw-dropping experience!

    --
    Do not look into laser with remaining eye.
  7. Re:Why not stainless steel? by trout007 · · Score: 5, Informative

    Titanium is stronger than most stainless steels and is 2/3 of the density. Also nickle is a component of stainless steel and can cause problems in the body. Titanium is inert in the body.

    --
    I love Jesus, except for his foreign policy.
  8. Re:Why not stainless steel? by soundscape · · Score: 3, Funny

    Why not? That funny "stainless steel" taste, of course.

  9. Bond, James Bond by milbournosphere · · Score: 4, Funny

    Richard Keil called, he wants his teeth back.

    1. Re:Bond, James Bond by 93+Escort+Wagon · · Score: 2

      Richard Keil called, he wants his teeth back.

      Don't say that too loudly - Barbara Broccoli might send a DMCA takedown order to the University of Hasselt.

      --
      #DeleteChrome
  10. Re:Why not stainless steel? by Dogbertius · · Score: 5, Informative

    Although it is useful in medical instruments (eg: scalpels, handles, etc), and is also used in artificial heart values, the nickel components of certain types of medical/surgical stainless steel are quite reactive within the body.

    Some people also naturally have considerable sensitivity to nickel outside the body too. Some people get terrible hives, rashes, and even permanent burns when wearing cheap jewelry (ie: silver plated jewelry which is made of nickel/rhodium alloys). Given such a damaging reaction when exposed to damp skin, having this inside the body could be dangerous.

    Good question. Cheers! :)

  11. Missed oppertunity by SeaFox · · Score: 4, Funny

    She should have had new titanium dentures built into it as well. She could have starred in the next James Bond movie.

  12. Re:Why not stainless steel? by somersault · · Score: 4, Funny

    Uh.. why not titanium? Does she really need her jaw to be stronger than a Mig jet fighter? Does she really want her jaw to be twice as heavy as a normal jaw so that she walks around like this :0 all the time?

    --
    which is totally what she said
  13. Re:Why not stainless steel? by trout007 · · Score: 2
    --
    I love Jesus, except for his foreign policy.
  14. almost true by iggymanz · · Score: 2

    pure titanium is as strong as typical steels but has less weight. Steels can be made that are much stronger than titanium.

    1. Re:almost true by trout007 · · Score: 4, Informative

      Pure Titanium is pretty weak with a Yield of around 20ksi. But the most common type is Grade 5 which when heat treated is good to about 150ksi yield. Most 300 series stainless especially 316 which is pretty much the most inert one is good to about 40ksi. You can get some insane Maraging steels that go to 350ksi. But working with those is a pain. The only times I've used it I had to wire EDM it.

      --
      I love Jesus, except for his foreign policy.
    2. Re:almost true by trout007 · · Score: 5, Informative

      I'm a mechanical engineer and I have to agree. Material selection is much more complicated than it seems. Let's take a typical aluminum parts I design.

      If it is a high strength part machined from a block I'd use AL 7075-T6 since it's very strong and machines well. The T6 is an artificial aging that makes it stronger.

      Sheet metal with tight bends 5052-O since other Aluminum will crack. The O means it is annealed so it's soft enough to bend cleanly.

      Welded parts I'd use 6061-T6 since it's strong and welds nicely. The only problem is when you weld aluminum you anneal the area around the weld and the strength can drop from 36ksi yield to about 8ksi yield. If you really need the strength you can artificially age the part after you weld it but then the part typically warps and you have to straighten it back.

      And once you have your part you have another problem with Aluminum. It's really soft. So it's easy to scratch and you can't get the surface clean because it keeps oxidizing and will rub off and make your hand black. So you can anodize it. There is a regular and a hard coat anodize if the part will be subject to wear.

      These are just a few of the material selections you need to make. And this is just aluminum.

      --
      I love Jesus, except for his foreign policy.
    3. Re:almost true by trout007 · · Score: 4, Interesting

      I got a (4 Interesting) so I'll continue.

      There are a couple of mechanical properties that you can generalize for a metal regardless of alloy type.

      Density is pretty consistent. Aluminum is about .09 lb/in^3, Titanium .16 lb/in^3, and Steels .28 lb/in^3

      But the most important one is Young's Modulus. This is basically how stiff a material is so higher is stiffer.
      Aluminum is 10 Mpsi
      Titanium is 16 Mpsi
      Steel is 29 Mpsi

      What is really freaky is that the Young's Modulus numbers are almost identical to the in proportion to the densities.

      --
      I love Jesus, except for his foreign policy.
    4. Re:almost true by Grishnakh · · Score: 2

      Nope. You need to differentiate between strength-per-volume and strength-per-weight. Per weight, titanium always wins, but pure titanium isn't that great, it's the alloys that really shine (no pun intended, especially since Ti isn't terribly shiny). 6Al4V is the normal "aerospace-grade" alloy, and is stronger per weight than any steel alloy. However, by volume I'm pretty sure it's the other way around; steel is stronger. So you can make a lighter part with the same strength as a high-strength-steel part, but it's going to be physically bigger.

    5. Re:almost true by flyneye · · Score: 2

      zinc

      --
      *Repent!Quit Your Job!Slack Off!The World Ends Tomorrow and You May Die!
  15. amazing but having hard time with that first claim by iggymanz · · Score: 2

    replacements for jaws are decades old (though not 3D model), I used to work in IT for dental practice network and replacements for war veterans who had them destroyed is something I remember.

  16. Re:Why not stainless steel? by CanHasDIY · · Score: 3

    Titanium is inert in the body.

    For now. But I'm sure the medical malpractice attorneys who advertise in between infomercials will find a way to claim otherwise in short time.

    Impresos en 3D el fracaso de titanio del implante? Marque cinco cinco cinco, cinco cinco cinco cinco!

    --
    An enigma, wrapped in a riddle, shrouded in bacon and cheese
  17. Re:Why not stainless steel? by Genda · · Score: 5, Informative

    Titanium interacts better with bone and the body tends to tolerate it well (most artificial joints are made of titanium), is lighter that steel, and has superb sintering properties. In fact nanograin titanium oxide (a ceramic) when shaped and sintered is transparent, as light as aluminum, stronger than steel, and far more flexible than either. It is extremely heat resistant and you could in fact build a very impressive engine block out of it... and be able to tune you motor by adjust combustion until your ignition color went blue (indicating complete optimal combustion.)

    You could print a very high quality bone replacement and put synthetic bone inside and out to support marrow, a blood supply and attachment points on the outside for muscle and tendon. In fact you could build anchor points for carbon fiber to replace portions of tendon, and the tendon would naturally grow into the fiber over time. With the work being done on 3D printing, Its almost certain that we'll eventually just print up actual replacement organs and tissues from our own stem cells and with a little Extracellular Matrix to make it all grow together, no scars, no complications. We truly live in amazing times!

  18. Re:On a more serious note... by swalve · · Score: 2

    If I remember the story right, much of the damage he suffered in the cancer treatment was because he had some kind of unusual bleeding problem. That's why he lost his voice; they had to do a tracheotomy to keep him alive. So they probably don't want to do any non essential surgeries.

  19. Re:On a more serious note... by SethJohnson · · Score: 2

    Roger Ebert lost his jaw because of uncontrollable bleeding from a blood vessel in his jaw that was weakened due to the chemo for the thyroid cancer. It was an unexpected byproduct of the original malady.

    He also says he won't undergo any more surgery, so it's unlikely he'll receive one of these jaws.

    The man is a national treasure. Any filmmaker who sees their film reviewed by Roger Ebert at this point in his life should consider themselves blessed, even if his review is saying the film sucks. It's a herculean task for him to watch these movies and write reviews.

    Seth

  20. The power of Kroll! by dbIII · · Score: 3, Interesting
    You also need to remove oxygen when exposing titanium metal powder to heat. You could make a bomb out of that stuff even more effective than the powdered aluminium ones. I got some sub-micron titanium powder in 1990 and the bag of powder was in a can full of argon, but even then the idiot that shipped it by air would be spending time in prison if he's done that today. To answer the GP poster, it wasn't a lot more expensive than the same mass of titanium metal (which isn't cheap). Some materials are actually cheaper to produce in powder form than in ingot form. With titanium the metal is first available as a porous sponge so producing a powder isn't necessarily more expensive than producing solid material (http://en.wikipedia.org/wiki/Kroll_process).

    On top of that, a sintered piece won't have the same strength as a milled piece

    That's true because it's not going to be 100% solid, but you can get to within 90% or more with laser sintering. However for this application being a little bit porous is an advantage because real bone can grow on it and into it. A bit over a decade ago researchers were treating milled titanium knee joints with hot caustic soda to make the surface porous and let bone grow into the portions that were in contact with bone.

  21. Re:Why not stainless steel? by Grishnakh · · Score: 2

    Titanium is routinely used for dental implants. A hole is drilled into the jaw, a titanium screw/stud screwed in, and a crown put on top. Titanium is ideal for surgical implants because bone actually grows around it, unlike other metals where bone recedes from them. For some odd reason, titanium is particularly bio-compatible, and doesn't cause any rejection issues like other materials. It's also popular for jewelry for people who are especially sensitive to other metals; it's like gold that way (gold is also hypo-allergenic), but obviously less expensive. A lot of people get rashes from stainless steel.

  22. The coming 3D printing disruption by Anonymous Coward · · Score: 3, Insightful

    3D printing is going to revolutionize the world. We are in a Moore's law-esque curve with the cost and capabilities of printers. They have already moved into the price range of a home computer (maker bot) and will soon sport the capability to print in combinations of varying arrays of materials. We're very quickly going to move from machines printing with one or two materials, largely either metal or plastic, into combinations of dozens, and then hundreds of materials. As we go, we'll also see the printing of biological devices (ie printing cells to scaffolding). Combined with research into stem cells and regenerative medicine, I expect the next 20 years to see a simultaneous,. interconnected revolution in manufacturing and biotechnology.

    I just hope I live long enough to take advantage. Just as I get to the age where my organs start to fail, I want science to deliver customized printable organs.