Page 48 - CEREC Q3|2013

46 | cerecdoctors.com | quarter 3 | 2013
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fig. 9: For the Framework Material,
we have two options: InCoris ZI meso
and IPS e.max meso. These blocks have
pre-manufactured holes in the center
of the block that are custom fit to the
titanium bases. Meaning, the fit is perfect
every time and there is no direct milling
of the margins. In this case zirconia was
used. However, one of the most exciting
developments of the V4.2 software is the
inclusion of the e.max CAD meso blocks.
This will allow the dentist to mill the
custom abutment same-day in their office
without the long sintering times associ-
ated with zirconia.
fig. 10: This image shows the Astra
4.5/5.0 Sirona TiBase seated intraorally.
This same tibase will be used for the final
restoration (bonding the zirconia custom
abutment to it). In this step it is used as
support for the Sirona Scanbody.
fig. 11: Here, the Scanbody is placed
on the titanium base (TiBase). This is
imaged directly with the Omnicam.
The triangle at the top of the scanbody
gives us all the information we need
for the position, depth and rotation of
the implant. We also take a scan of the
opposing, the buccal bite, Biocopy image
of the provisional (before removal) and
tissue (Gingivamask). It is very important
to take the gingiva mask scan immedi-
ately after removal of the provisional
screw-retained crown to prevent the
tissue from collapsing.
fig. 12: Now, in the Model phase, the
Step menu at the bottom of the screen
will instruct you to the steps that need to
be completed prior to moving on to the
Design phase (underscored in red). In this
initial step, you must trim the scanbody
away from the rest of the model (now a
critical step in red).