Sydceramist
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Has anyone had consistent results milling a Zirconia abutment to a Titanium interface using a table top mill such as ezmill VHF, imes, Roland etc 4 or 5 axis.
Singles are no problem for the mini. Screw retained bridges on the other hand are impossible
Impossible in what way john? Impossible on the Mini?
Is the mini a 4axis? then you can not but you should be able to on a 5axis machine no problem. Depends on the angle of the implant and insertion direction.
As a compromise to the limitations of the 4 axis mill, I was thinking of altering the Ti interfaces/abutments to better suit the desired parallel parameters for the mill. Is this to much of a compromise by reducing the cemented area between Zirconia to the Titanium.
So that a 4 axis mill can mill it with diverging angle/paths.
The only way to mill implant bridges is on a 5 axis unless the implants are perefectly paralel or the disc gets turned in the holder.
Milling these cases absolutely requires a 5 axis mill. The fifth axis will accommodate the different angles of the screw access holes.Yes, because you will be unable to get the insertion direction for each access hole the same. I have not found a way to do it unless the fixtures are extremely parallel to one another which is rarely the case.
What I would like to be able to do is have the ability to do a dual mill where the tilt angle could be adjusted after the initial mill by marking the disk and then rotating the puck in the fixture and adjusting the tilt angle to fit the requirements. This would allow almost anything to be milled in a 4x if I am thinking clearly.
Truth is, my plans are another new mill this next quarter, I am shopping now.