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quarter 3 | 2013 | cerecdoctors.com | 15
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temporary (Fig. 16). The composite
filling is removed and the temporary is
unscrewed from the implant. The TiBase
is screwed into the implant, trying to
keep the engaging mechanism as close to
straight buccal as possible (Fig. 17). In the
4.2 software, the restoration is designated
as an abutment multilayer Biogeneric
individual. In the acquisition stage, an
upper gingival mask catalog is added.
The TiBase with the contoured tissue is
then imaged in the gingival mask catalog.
The scan body is placed and imaged in
the upper arch catalog (Fig. 18). The
lower and buccal bite is imaged as well
in their respective catalogs. The tempor-
ary abutment crown is then replaced,
and the screw torqued to 15ncm. Teflon
tape and composite is again placed in the
access hole and the patient is sent home.
Now creation of the restoration begins.
Once the models and buccal bite are
articulated, the model axis is set. The
model axis default is to set the mandible.
This is to set the occlusal plane for
virtual articulation, which in turn affects
the other settings within the articula-
tion function. The occlusal plane is set
by aligning the incisal edge of the lower
central incisors to the distal buccal cusp
of the second molar. In a case like this
one, when neither the centrals nor the
secondmolar are imaged, align the image
as shown with the incisal edge of the
canine to the distal cusp of the first molar
(Fig. 19). Setting the model axis also tells
the computer the buccal-lingual and
mesial-distal orientation. Any off-angle
or canted model boxes are also corrected
with this step.
Once the model axis is set, the model is
then trimmed around the scan body and
the head of the scan body is designated
(Figs. 20-21). Trimming the model must
be done when designing abutments,
unlike when doing a crown or onlay. If it
is not done, then the adjacent teeth will
be cut away and the proper contacts will
not be able to be created. Designating the
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