Case Study: Fabrication of a single CERAMCO® PFZ crown
Zirconia is equipped with valuable properties such as biocompatibility,
translucency, opacity and has the possibility of colorized copings, and
compared to precious alloy- due to its ubiquitous availability the base
material is of low price.
To create a natural looking crown three steps are crucial:
1. The adequate design of the framework to create sufficient support for the
longevity of the ceramic.
2. The correct layering of the ceramic. An even amount of ceramic has to be
applied around the framework to avoid failures when the ceramic is fired.
3. Ceramco® PFZ (PZ shades) are extremely easy to use and provide a
natural appearance with shade matching that is keyed to the VITA®
3D-Master* Shade Guide.
Step 1
Zirconia coping
A 73 year old patient
presented himself with a
fractured lingual cusp of
tooth #12. Cusp support
on the lingual aspect was
needed to avoid problems
with ceramic i.e. chipping.
Step 3
PFZ Internal Stains
To accentuate color, e.g. in
cervical areas PFZ stains can
be used. Even with a thin
layer of ceramic the proper
color that enhances the
depth is attained.
Treatment: Dr. Patrick Leconte
Step 2
PFZ Margin Porcelain and Modifier
Properly fitting Zirconia
coping with adequate
ceramic support. Perfect seal
of the margin.
Margin porcelain mixed with
glaze liquid is used. Fired at
60°C/min to 1000°C with a
hold for one minute.
Step 4
Step 5
PFZ Opaceous Dentin PFZ Clear
A thin layer of opaceous
dentin porcelain is applied to
cover the coping
* Vita and 3D-Master are registered trademarks of Vita.
Clear is applied 60° around
the incisal area and contact
points of the adjacent teeth.
With margin porcelain
modifiers (Ceramco), the
chroma can be increased in
certain areas.
Step 6
PFZ Dentin
Dentin mixed with 50%
dentin modifier is applied
only over the occlusal table.
The surface is covered as thin
as possible with this mixture.
Step 7
PFZ Dentin and
Dentin Modifier
Step 8
Dentin, Opaceous
and Modifier Firing
2/3’s of the tooth structure
and parts of the mamelon
area are covered with Dentin
ceramic.
The ceramic is baked and
the crown is fitted on the
cast model and adjusted as
needed.
The only purpose of this
initial bake is to obtain color
and volume.
The chroma should be a little
bit chromatic than the shade
desired, because anatomy
and final volume will be
created during second bake.
Adjustments are made before
applying enamel.
Step 9
Enamel Light & Ivory
Step 10
Finishing
With enamel (natural enamel
light and ivory) chroma can
easily be achieved, and only
limited contraction occurs
during bake.
After cooling adjustment are
made of the occlusion with
large wheel to create wear
facets.
Polishing of the surface.
Glazing
Polishing
After polishing
Polishing of the surface.
Use of a diamond bur to
produce the correct texture.
Occlusal view of
the crown after
polishing.
Preparation of the tooth.
Notice the deep chamfer at
the preparation margin.
Crown placement.
The final crown in situ.
Use of a diamond bur to
produce the correct texture.
Recommendation: second
bake 10°C less than the first
one.
Basal view.
Distal view.
About the Author: Carlos Montaner, CDT
- 30 years of experience in dental technology
- Studied in Boston/MA – Presented as an International Speaker
- Published numerous articles in Venezuela, Argentina, Brazil and Spain
- Owner of Montaner Dental Studio in APEX/NC
DENTSPLY International, Inc., DENTSPLY Prosthetics, 570 West College Avenue, York, PA 17401
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DP-0000158 Rev. 0 (02/2016)