Ivoclar Vivadent IPS e.max CAD Abutment Solutions - Manual (Page 60)

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Frequently Asked Questions
In addition to the desired tooth shade, why should the root
shade also be defined/ determined upon shade determination?
IPS e.max CAD Abuttment Solutions allow you to fabricate restora-
tions with a lifelike appearance both in the visible area and the area
below the gingiva (root). By defining the root shade, a highly esthetic
outcome can be achieved especially in the case of receding gingiva.
Is it possible to fabricate an abutment or an abutment crown
with IPS e.max CAD (LS
2
) without using a Ti base?
No! For this indication, IPS e.max CAD needs the support provided
by the Ti base. In addition, the Ti base allows an optimum (industrially
fabricated) fit to the implant to be achieved.
Which Ti bases can be used for the fabrication of IPS e.max
CAD Abutment Solutions?
Only Ti bases of authorized CAD/CAM systems may be used.
More information about the CAD/CAM cooperation systems is
available on the Internet from www.ivoclarvivadent.com.
Is it permissible to modify the selected Ti base?
The Ti base must not be adjusted by grinding, as this would compro-
mise the fit of the IPS e.max CAD ceramic structure.
The instructions of the manufacturer regarding the preparation for
permanent cementation must be observed.
Is a hybrid abutment crown indicated in the anterior region?
This indication depends on the position and inclination of the
implant. If the opening of the screw channel is located on the oral
surface, a hybrid abutment crown may be fabricated in the anterior
region.
May a hybrid abutment crown be cut-back and subsequently
supplemented with IPS e.max Ceram layering materials.?
No. For implant-supported restorations, it is recommended to
fabricate monolithic restorations (without veneer). In this way,
chipping of the layering ceramic is prevented.
Do IPS e.max CAD ceramic structures have to be glazed in all
cases?
No. High gloss can also be achieved by a corresponding polishing
procedure. The polishing technique (before crystallization) is pre-
ferably used for the emergence profile of the hybrid abutment.
For the hybrid abutment crown, the application of glaze is
recommended.
Is it possible to use an IPS e.max CAD hybrid abutment as an
abutment for a bridge restoration?
No. Only single-tooth restorations may be fabricated.
Can different CAM units be used for milling the IPS e.max CAD
ceramic structure (abutment) and the dedicated IPS e.max CAD
crown?
If different CAM units are used, inaccuracies of fit may occur in
unfavourable cases. Therefore, both IPS e.max CAD objects
(abutment, crown) should be ideally milled in the same CAM unit.
Can a clinical try-in be conducted with the IPS e.max CAD
Abutment Solutions? How are the ceramic structures prepared
for this?
Yes. Clinical try-in may be performed either before or after crystalli-
zation of the IPS e.max CAD ceramic structures. The Ti base and
IPS e.max CAD ceramic structure are temporarily joined in the
laboratory by means of a silicone material, e.g. Virtual Extra Light
Body Fast Set. This facilitates the intraoral handling during clinical
try-in with the patient.
What must be observed for the clinical try-in of a crown on
a hybrid abutment?
To check the occlusion/articulation and to make possible
adjustments, the crown must be temporarily secured on the hybrid
abutment with a silicone material, e.g. Virtual Extra Light Body Fast
Set. The silicone material acts as a buffer and prevents chipping in
the marginal area of the crown. Try-in pastes or Vaseline must not be
used for functional checks.
CAD Abutment Solutions
General Information