Dental Asia Jul/Aug 2017 - page 65

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DENTAL ASIA
JULY / AUGUST 2017
BEHIND THE SCENES
the inCoris CCBblank can easily be identified byQR code detected by
a webcam (Figure 15)—a convenient feature that can also be used
for all other inCoris blanks. TheQR code provides all of the necessary
information on the current blank without the inconvenience of
manual data entry; the software even recognises already partially
milled blanks.
Fig. 14
Fig. 15
Fig. 16 Fig. 17
In this case, the restoration to be milled could be positioned within
the blank quickly and without any complications (Figure 16). In the
production preview, the sprue connections were reduced and the
milling job passed on to the laboratory’s own inLab MC X5 5-axis
milling unit (Figure 17). The software presents a reminder screen
at this point (Figure 18) to ensure that both the correct workpiece
and the corresponding tool magazine are loaded into the unit
(Figure 19).
Fig. 18 Fig. 19
Fig. 23
Fig. 24
Fig. 25
Fig. 26
Fig. 20 Fig. 21
Fig. 22
After 20 minutes of wet milling, the workpiece with the milled
bridge framework could be removed from the inLab MC X5
(Figure 20). The blank was allowed to dry overnight and the
framework separated the next day. Since the inCoris CCB blank is
made of a sinteringmetal, the next stepwas the sintering step that
brought the framework to its final size and strength (Figure 21).
This step was performed in the inFire HTC speed sintering furnace
(Dentsply Sirona CAD/CAM). For NPM sintering, the furnace was
fitted with an argon gas connection and a special “argon” door.
The framework, now with its final dimensions, could now be tried
on themodel (Figure 22). A tension-free fit was noted, reaming that
the framework was now ready to be veneered.
Case 2
The second case involved amuchmore extensive restoration. Due to
the extraction of a tooth that had previously served as an abutment
tooth, several bridges had to be replaced by a large 11-unit bridge.
The workflow and approachwere similar to that described for case
#1. Again, the impression was taken digitally by a CEREC Bluecam
and transmitted to the laboratory’s own inLab CAD SW 16.0 unit
via Sirona Connect.
Fig. 27
Fig. 28
The virtual design of the master model (Figures 23 to 25) was
followed by its physical production using an STL data export and
a 3D printer. The bridge framework was subsequently designed
using the biogeneric function of the software, as in the previous
case (Figure 26).
For the production, the resulting data recordwas transferred to the
inLab CAM SW 16.0 (Figure 27), where the restoration (Figure 28),
the sprues, and the sintering connector required for the subsequent
sintering process (Figure 29) were positioned and the milling job
initiated (Figure 30).
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