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Engineering Materials
Slideshow: Smallest Dental Labs Get 3D-Printed Models
4/5/2013

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The Objet30 OrthoDesk dental printer measures 82.5 x 62 x 59 cm (32.28 x 24.4 x 23.22 inch), and fits on a desktop or printer stand.   (Source: Stratasys)
The Objet30 OrthoDesk dental printer measures 82.5 x 62 x 59 cm (32.28 x 24.4 x 23.22 inch), and fits on a desktop or printer stand.
(Source: Stratasys)

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Ann R. Thryft
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Re: Saw some new things last month at D&M south in Orlando
Ann R. Thryft   4/11/2013 1:50:43 PM
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Thanks, JimT. We're already on to these. MakerBot has been around quite awhile, as has 3D Touch. The latter was made by 3D Systems, and is now listed on its "discontinued personal printer" page: http://cubify.com/legacy/ DN has covered EnvisionTec as far back as 2008: http://www.designnews.com/author.asp?section_id=1386&doc_id=209213 http://www.designnews.com/document.asp?doc_id=228209 http://www.designnews.com/document.asp?doc_id=229043 http://www.designnews.com/author.asp?section_id=1392&doc_id=211771 Interesting question about pricing strategies, but we'll never know.

Ann R. Thryft
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Re: 3D Scanning?
Ann R. Thryft   4/11/2013 1:31:10 PM
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Stratasys didn't give any details on the 3D scanning software used. But a dental lab I spoke to that makes single-piece crowns and bridges, not models, using a different vendor's 3D printers mentioned to me that those printers talk to STL files, apparently a standard file format in 3D printing now, at least for dental applications.

Rob Spiegel
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Re: Good application for 3D printing
Rob Spiegel   4/11/2013 10:24:00 AM
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There is another area where 3D printing makes sense, Elizabeth -- prototypes. Design News has covered 3D applications related to prototypes. Plus, comments on the 3D printing stories indicate that 3D printing can actually save money as companies produce prototypes.

whale58
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Iron
Re: 3D Scanning?
whale58   4/11/2013 10:21:44 AM
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Great question!  I was wondering the same thing.  Seems like that could be a greater cost than the "printing".  Maybe that's why all of the analysts are bearish and assess Stratasys as a Sell right now?  I wish someone had the answer to this question.

Ann R. Thryft
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Re: 3-D printing for dental
Ann R. Thryft   4/10/2013 2:16:29 PM
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You're welcome, bobjengr. All my crowns have been in the back so far, so gold is fine with me.



JimT@Future-Product-Innovations
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Saw some new things last month at D&M south in Orlando
JimT@Future-Product-Innovations   4/10/2013 12:31:38 PM
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Hi, Ann- we haven't talked for a while;  In the time gap I've learned about three new 3D processes I hadn't previously been aware of --- just FYI (,,,but I bet you already know these,,,)

1. MakerBot – Yes, I heard of them, but recently saw & handled their FDM parts and learned the apparatus is only $2,200 to own. It prints ABS in .004" layers [100 microns]. Fantastic capability at that price.

2. 3D-Touch - Also FDM, also runs ABS, also .004", but a little higher priced apparatus at $3,900. (So many similar features considered, I think Maker-Bot may have them beat).

3. EnvisionTec, based in Germany (and Detroit) makes a printer using a patented technology called voxilation (volume-pixilation). It seems to be a cross between FDM and Objet PolyJet printing with very fine Z-step resolution at .001" [25 microns].  While Objet has long had superior Z resolution (about half that much at 10 microns), the compelling point was the machine cost was advertised at $40,000, significantly lower than previous Objet prices.  That is, until I read your article showing Objet now at $39,000.  Wondering if EnvisionTec forced Objet to that price-point-?

Elizabeth M
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Re: Good application for 3D printing
Elizabeth M   4/10/2013 4:05:19 AM
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I know what you mean, Rob. I personally don't see the excitement around 3D printing, but now that it's starting to be used for more useful purposes, I can see the draw. In my mind it seemed more like a hobbyist, self-indulgent thing--like a friend just told me he is going to provide files online so people could 3D print some of his company's designs at home for fun. But when the auto industry and now the dental industry is starting to use 3D printing as a way to make things cheaper and more efficient, it makes more sense, as you point out.

Rob Spiegel
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Re: Good application for 3D printing
Rob Spiegel   4/9/2013 10:33:58 PM
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I agree, Elizabeth. In many instances, the 3D printer seemed like a produict in search of a solution. Cool technology, but really, do we need one? The idea of smaller dentists using this makes a ton of sense.

solarsculptor
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Silver
Re: 3-D printing for dental
solarsculptor   4/8/2013 9:10:05 PM
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If you look at the galvanic table of metals, gold is way up near the top, stainless steel is below it. Stainless steel can be "passivated" to bring it closer to Gold, but passivation is a layer only a few atoms thick, one scratch and it will rust. The body has water and salt, condictive, just add two different metals and you get a battery, and one of them will corrode. Braces are "temporary" and removable for cleaning.

The Chinese put melamine in their infant formula to save money, I wouldn't use them as an example of healthy frugality. Every Russian I have ever met had a mouth full of gold crowns, so I'm not sure about that information.

If you want inexpensive but safe go ceramic(zirconium). Not galvanically active, nontoxic, easy to machine. The amount of gold in a crown is just a few grams, you couldn't fit an ounce in your mouth if you got all your teeth capped. Better to save money somewhere else  and stay healthy.

j-allen
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Gold
Re: 3-D printing for dental
j-allen   4/8/2013 7:06:02 PM
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From my reading, dentists in China,Russia and other countries that don't have money to waste on gold seem to do just fine with non-precious alloys.  (unless, I suppose, their patients routinely gargle with battery acid)   It is true that pure nickel (alloy 200) will cause an allergic reaction in a small minority of people, but even for them, incorporating the nickel in alloys such as Inconel binds up the nickel so it apparently is not a problem.  The amount of corrosion, while perhaps not "zero" is insignificant during a human lifetime.  Remember that orthodontic braces are made of 300-series stainless which is far less corrosion resistant than the Inconel group yet they and don't dissolve in people's mouths.  Saliva just ain't that nasty. 

It is my understanding that a main attraction of gold is that the capital equipment to cast it into dental parts is quite cheap.  Thus the dental lab gets off with minimal expense and passes the high cost of the metal on to the patient.  One would hope that CNC technology would change that. 

 

 

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