Ivoclar Vivadent IPS d.SIGN - Manual (Page 4)

4
Another property that this new type of
surface structure exhibits is excellent
polishability and limited abrasion to opposing
natural tooth structure. The IPS d.SIGN
materials demonstrate outstanding stability
and are fired at temperatures below
900 °C/1652 °F. Alloys
Each metal supported restoration starts with
the fabrication of a metal framework. For
that purpose, various IPS d.SIGN alloys are
available. The IPS d.SIGN alloy selection
ranges from high gold alloys and gold-
reduced alloys to base metal alloys. These
alloys meet the international requirements of
ISA and ADA and were developed in
combination with IPS d.SIGN.
The coefficient of thermal expansion (CTE) is
a significant parameter for dental materials.
It is vitally important to ensure the thermal
compatibility between alloy and ceramic
material. In the 25–500 °C temperature
range, the CTE values of the IPS d.SIGN
alloys range between 13.8 and
14.8 x 10
-6 K -1 , depending on the alloy's
composition. The coefficient of thermal
expansion of the IPS d.SIGN ceramic is
12.0–12.6 x 10
-6 K -1 .
The IPS d.SIGN alloys
– IPS d.SIGN 98 (high gold)
– IPS d.SIGN 96 (high gold)
– IPS d.SIGN 91 (gold-reduced)
– IPS d.SIGN 84 (palladium-based)
– IPS d.SIGN 67 (palladium-based)
– IPS d.SIGN 59 (palladium-based)
– IPS d.SIGN 53 (palladium-based)
– IPS d.SIGN 30 (chrome-cobalt)
– IPS d.SIGN 15 (nickel-chrome)
The compatibility of the IPS d.SIGN ceramic
and IPS d.SIGN alloys was thoroughly tested.
When using other alloys, please ask your
alloy manufacturer if they are compatible
with IPS d.SIGN ceramic.
Vertical abrasion to the enamel of the antagonist.
Internal investigation, R&D Ivoclar Vivadent AG (1998)
This bar diagram depicts the abrasion to antagonist enamel compared to other
dental ceramic materials.
John A. Sorensen, DMD, PhD (1999)
Abrasion to antagonist enamel
Feldspar ceramic
In vitro-equivalent years
Ceramic A
m
m
2
Ceramic F Enamel IPS d.SIGN
Ceramic B Ceramic C Ceramic D
Ceramic E
The product range may vary from country to country.