Dentaltown July 2022 - 26

EARNED PLACEMENT
Medit's Intraoral Scanners Make
Dentistry Easier, More Accurate
by Dr. Na Kiwon
* D.D.S., College of Dentistry, Chonnam National University
* Trained at the Department of Prosthodontics,
Gachon University Gil Medical Center
* Diplomate, Korean Board of Prosthodontics
* Director of Yeonsu Seoul Dental Clinic
* Medit key opinion leader
he adoption of digital technology
in the dental field is changing
many clinical protocols,
making cumbersome processes easy
and the impossible possible. I believe
these are positive changes for easier
and more convenient clinical trials.
Fig. 1: Ceramic inlay by digital impression.
T
Digital dentistry begins with the
digitization of information needed for
treatment, and it is important to convert
such data into digital form as accurately
as possible. An intraoral scanner
can be deemed the most suitable
input device for the digital workflow,
because it directly and immediately
digitizes a patient's intraoral information,
including teeth, soft tissue and
occlusal relationship.
Many intraoral scanners are being
used clinically as of 2022, and their
reliability has increased significantly
compared with just a few years ago,
with an overall rapid advancement in
performance. There are reports of digital
scanning showing better marginal
adaptation than conventional impressions
in the case of single restoration,
as well as reports of significant improvement
in the error range for complete
arch scan data (which tended
to fall short in accuracy compared to
partial arches). My own clinical experiFig.
2: Monolithic zirconia crown by digital impression.
Fig. 3: Implant restoration by digital impression.
Fig. 4: Monolithic zirconia bridge by digital impression.
ence is consistent with these findings.
I've been using Medit's i500 and
i700 intraoral scanners and obtaining
satisfactory results through digital
scanning when restoring natural
teeth and implants (Figs. 1-4). I had
the opportunity to use the recently
developed i700 wireless and found it
easier to apply intraorally and change
scan positions. By sharing the screen
of the scanner PC with the chair
monitor, I was also able to conveniently
move the scanner and scan without
having to drag a scanner cart. I had no
issue applying the i700 wireless to my
clinical practice because there was no
difference in scan data quality or FPS
compared with the wired device (Fig.
5). I think I will use the i700 wireless
more often in the future.
An intraoral scanner is a device
attractive enough as an alternative
to conventional impressions, but its
greater advantage is the possibility of
clinical expansion through scan data.
My preferred clinical protocol is to digitally
create temporary restorations. Intraoral
scanning immediately creates
a digital model, enabling chairside
digital workflow for provisional restorations.
After preparations for zirconia
crowns and intraoral scanning, I
design crowns using a CAD program
and create 3D-printed or PMMA milled
temporary restorations (Figs. 6 and 7).
A CAD program is required to design
the desired shape of restorations. In
cases in which the shape of the original
tooth before preparation can be used to
create a temporary restoration, the Medit
Temporaries App can be used to very
simply design an eggshell temporary in
the shape of the tooth before prep or
design a temporary restoration to fit the
margin in the shape of a pre-prepared
tooth after scanning (Figs. 8 and 9).
26 JULY 2022 // dentaltown.com
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Dentaltown July 2022

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