Discussion in 'Dental-CAD' started by Nu Technologies, Feb 6, 2015.
the secrets behind DOF and how complicate repairs are
With that limited range of motion how do you scan undercuts?
No need to bash DOF, you have a good product. Most undercuts are easily scanned, as I think you know.
The angle isn't a flat 90 degrees, but more like position 3. Anything more I've yet to find a need for.
Not bashing Gru, just asking. So the missing data is filled in with the software?
i have dof freedom hd and i have never thought dof cannot scan undercuts if you compare it with other scanners
actually i am pretty happy with performance so far
I am not sure you really understand how scanning works and what you think your two axis can do more or does your third non calibrated matched only axis work on models too ????
What missing data? It's there in the scan before you move forward to process it.
Every mechanism has its advantages and disadvantages. The mechanism illustrated in the video touts the benefit of fixture free scanning. The object to be scanned is stationary and the scan module moves in an arc over the object to scan it. The downside of this design is the limited range of motion. If the object is small and has undercuts (an abutment for example ) then the scanner will not be able to capture data because it can't rotate under the scan target. To compensate for this missing data the scan software will fill in the missing geometry with a best guess based on the surrounding geometry. The result is data that is not accurate in critical areas like the margin of the abutment.
Gru, in your illustration above you took liberties with the range of movement. The axis of rotation does not move as shown in your illustration. The range of motion is controlled by the gear and the center of rotation. I am not trying to bash but I am pointing out that each design has strengths and weaknesses. If you have the product and it fits your needs then all is well. If someone is shopping for a scanner then they should know the advantages and disadvantages of the design.
Glenn, you have obviously not used a DOF HD.
I scan abutments daily and the milled crowns fit like a glove. There is no missing data especially on something as easy to scan as a single abutment.
Someone should certainly be able to do a scan like this and grab a screen shot of the mesh without the virtual skin. If its missing data, there would be no points or triangles in the missing area. No?
I'd be blocking out the sharp margin with wax...regardless of what scanner I'm using...
The missing data that most concerns me is between my ears.
No, Glenn, I did not take liberties with the range of movement. The gear clearly does allow the position as you can see below. The scan module goes BELOW 90 degrees on my unit.
It is also easy to raise the scan object above the table if you have common sense or an experimental nature to what you do as most technicians have.No reseller input necessary.
So true. Man I love Korean engineering though. Modular and simple. Not only on this unit, but many other things I've dissected.
Like a kimchee jar?
sorry Glenn never heard so much BS show us a scan with the hybrid with such hard angle we show you one with the hd no childish pics but i dont think you do !!!! we can scan the same model and compare no fear just hard facts , no sales stories hard facts .I think the Bego engeneers know why they choose Roeder HSC RD 5 , EOS 270 and the other ones and not Rola... and M..it. I am ready for a competition.
Nah, can't stand it, but my Korean exchange students are nuts about it!
C'mon, be nice to Glenn! He's one of the good guys.
I only responded because I pride myself in being accurate in what I say- when I screw up, I'll admit it. It's all good.
It's a mountain out of a mole hill. The Medit's a great scanner and was one of the only two I seriously considered.
So Gru, tell us why you decided on DOF rather than Medit? I like Glenn, but sales BS is sales BS and there really is no place for it on a technical site.
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