Dental Asia Jul/Aug 2017 - page 72

70
DENTAL ASIA
JULY / AUGUST 2017
DO YOU KNOW
A
t this unusual event, twenty participants were
asked to treat a real patient by using three different
treatment approaches. At the end of the session, the
patient had to decide which type of restoration she
preferred: the IPS e.max
®
CAD restorationmadewith
a chairside method and completed by the dentist; a conventional
CAD/CAM-fabricated restoration; or a restorationmade of IPS e.max
Press. The attending dentist and representative of the chairside
approach, Dr Petr Hajný looked like he was going to break out into
a sweat once he fully understood the implications of this challenge.
The contenders were not to be underestimated. His preliminary
work and the needs of his patient would set the standard for his
fellow contestants (Figures 1a to 1g).
In actual fact, the task turned out to be more complex than
was initially anticipated. A wide array of fabrication options was
available. The participants were able to choose between IPS
e.max CAD (lithium disilicate); highly translucent IPS e.max ZirCAD
(zirconiumoxide) either inmonolithic or anatomically reduced form,
ground or milled; or IPS e.max Press full-contour or anatomically
reduced pressed and subsequently stained/veneered restorations;
or a combination of all these versions. The range of choices was
extremely wide because of the exceptional versatility of the
all-ceramic product portfolio of Ivoclar Vivadent (Figure 2).
For those of you who find your head spinning at the thought of all
these possibilities, you will be relieved to know that the solution
actually turned out to be quite simple.
This contest offered a number of possibilities for comparing
different methods, such as the CAD/CAM and the conventional
fabrication techniques, and analysing them according to a number
of critical aspects. Nevertheless, the patient would be the deciding
factor in this challenge. She would be the one whowouldmake the
final decision, irrespective ofwhether the restorationwas fabricated
chairside, stained, veneered or fabricated with the conventional or
CAD/CAM technique.
Could the simplest restoration perhaps be themost attractive one?
How important is the number of powders and colours that are used?
What is the significance of the shape and surface structure of the
restoration for the overall esthetics? How important are listening
skills to find out what the patient really wants?
In any case, the event offered the participants a wonderful
opportunity to find out all the answers to these questions and
more from the most important person in this case: that is, the
patient. Now, let us join the contestants at the ICDE in Vienna and
accompany them on this exciting journey (Figures 1 to 22).
DA
Many Ways with
one
material
Recently, nineteen dental technicians from all over the world and one dentist from the
Czech Republic convened at the International Centre of Dental Education (ICDE) in
Vienna. They were invited by Ivoclar Vivadent to take part in a very special educational
session, where they were given the opportunity to compare their expertise with other
seasoned dental professionals. The title of the challenge was “One aim, three solutions”;
the material they would be using was IPS e.max.
Figs. 1a to 1g: Dr Hajný shows
photos of the preoperative
situation. He highlights the
esthetic failings of the old
restorations on the central
incisors. In order to enhance the
esthetic appearance of the new
restoration, the patient agrees to
have tooth 12 and 13 and tooth 22
and 23 included in the restorative
treatment strategy. The three
groups – conventional laboratory,
CAD/ CAM laboratory and CAD/
CAM chairside – are allocated a
specific time in which to fabricate
the all-ceramic restorations for
teeth 13 to 23. The old crowns are
removed from tooth 11 and 21.
Tooth 11 is shown to have been
restored with a metal root post in
the past. Dr. Hajnýmasks the post
with opaquer to adjust the shade.
Fig. 2: The materials portfolio from Ivoclar Vivadent is
immense. Therefore, the selection and combination
possibilities are extensive. While this stage is easier for
the conventional group, since they are using IPS e.max
Press and the associated ingots, the CAD/ CAM team
should also be thinking about using monolithic and
individually characterised IPS e.max ZirCAD zirconium
oxide restorations.
Fig. 1d
Fig. 1e
Fig. 1g
Fig. 1b
Fig. 1c
Fig. 1a
Fig. 1f
by
Mr. Dan Krammer
1...,62,63,64,65,66,67,68,69,70,71 73,74,75,76,77,78,79,80,81,82,...88
Powered by FlippingBook