Dentaltown June 2021 - 44

Today, with digital dentures, reproducing
Figs. 11 and 12: The patient's existing dentures are scanned 360 degrees, using iOS
technology 3Shape Trios 4, creating an exact duplication. These fi les are then printed by the
laboratory or in-offi ce printing solutions.
a prosthetic a patient finds agreeable is
eminently achievable. Together, sophisticated
scanning technology and design software
allow us to re-create a patient's current
denture with a very high degree of fi delity.
We can also modify a device's aesthetic
dimensions while improving the fi t, which
is often precisely what patients want.
In simple terms, modern digital dentures
Fig. 13: Closed-mouth functional fi nal
impressions are conducted within the 360
dentures. This allows the clinician to make
various modifi cations to the intaglio surface
and peripheral borders as well as occlusion.
Closed-mouth functional fi nal impressions
create a high precision result because of
the material being dispersed through the
dental arches under the patient's functional
forces (tissue compression) as well as their
neuromuscular and functional activity.
replace error-prone plaster molds with precise
computerized fi les. Using this technology,
properly trained dental professionals can scan
impressions of a patient's mouth, transform
them into 3D renderings on a computer
screen, and start a precise computer-aided
manufacturing process at the push of a
button.
The workfl ow highlighted in the accompanying
case is known as the reference
denture technique. We begin by using
a patient's existing denture as our initial
reference record, then we fabricate a fi nal
definitive prosthesis according to these
initial specifi cations. We duplicate these
prosthetics and use them as closed-mouth
functional impression trays and as a formality
of " wax rims " with teeth-all in the same
appointment! This can also be done in the
patient's existing denture; however, it may
render some challenges.
Technological know-how
In my practice, I currently use sophisFigs.
14 and 15: The functional impressions are conducted utilizing Virtual VPS monophase
material (Ivoclar Vivadent) for the maxillary peripheral borders as well as the entire intaglio
and borders for the mandibular arch. Light-body material is used to take the fi nal wash
impressions in both arches. Lastly, after taking the CR record, a thin bead of monophase is
used to capture a " post dam " in the impression surface.
ticated scanning, 3D-printing and milling
technology to re-create reference dentures.
My workfl ow begins with a full 360-degree
scan of the patient's existing denture, which
allows me to create a duplicate of it to be
used to take impressions. I also have the
capacity to 3D-print a prototype of the new
proposed fi nal denture, which is known as
a functional try-in. The clinician can use
this sophisticated prototype to evaluate the
initial design.
44 JUNE 2021 // dentaltown.com
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Dentaltown June 2021

Table of Contents for the Digital Edition of Dentaltown June 2021

Dentaltown June 2021 - Intro
Dentaltown June 2021 - Cover1
Dentaltown June 2021 - Cover2
Dentaltown June 2021 - 1
Dentaltown June 2021 - 2
Dentaltown June 2021 - 3
Dentaltown June 2021 - 4
Dentaltown June 2021 - 5
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