As IO scanner,
Trios is a faster unit then iTero and will even get faster once the software update is coming (code name : insane mode)
The only benefit of iTero as today is the invisalign. But that end in Q4 because 3Shape will be compatible with Invisalign.
Now concerning scan body, yeah it suck, yeah it really not well done by companies. This is a total non-sense and it stupid the way it was done first.
So here the deal, you scan an object with your scanner, whatever the shape as long the scanner see it.
In the "design" software (3shape, exocad, dental wings) you upload this STL file.
Out of a database you have to "merge" the "technical design" of this scanbody with the provided STL file.
This will give us the orientation of the HEX and the position in "Z" axis of the implant.
The problem is scanbody company do not give for free their "technical design".
Once you have design your part you will send it to a milling center, your design software (exocad, 3shape or dental wings) send the information but it not complete, the "Z" position is hidden. As a milling center we have to either PAY the scanbody company for the library to tell us this data OR we can do reverse engineering.
Reverse engineering mean we have to buy each of the scanbody our customer use, take measurement, create our "technical drawing", incorporate it in a "config file" and ask your (the customer) to install it on your design software.
Once done when you do the "merging" step you have to select us as milling center, now we will be able to know where the "Z" axis is.
If you are good with computer you can do this part before sending to milling center so when you will send the STL file, the bottom part will have been replace by a "technical design" that can be milled.
For an example us at Panthera so far we have reverse engineering ELOS and some DESS scanbody and working to complete DESS.
Next will be NT Trading and after probably Atlantis scanbody and will see after.
From my point of view of milling center : this whole thing is really a piece of garbage!!
But well that how it is.