Other Dental Porcelains
This page could give you a lot of tech talk and you
would probably get lost in the middle of all these names
and terms. But I will try to keep it simple.
3G OPC Porcelain:
The 3G OPC ceramic system's unique formulation results
in a highly esthetic, translucent, and less abrasive
"over porcelain". Its high strength and durability
make it the material of choice for all-ceramic anterior
bridgework.
3G OPC Porcelain is both chemically and physically compatible with zirconia-made
products that are not glass infiltrated, such as Cercon and Procera. As zirconia-based
core copings and multiple unit bridges become more and more common, there
is a need to improve upon the overall esthetics of this strong and durable
metal-free framework. 3G OPC overlays
and core stain materials are used on top of zirconia cores to manipulate hue,
value, and chroma of the restoration
IPS Empress 2:
This dental porcelain is not produced anymore. It has been replaced by two later generations of porcelains:
Eris (not in production anymore) and eMax.
IPS Empress 2 wass manufactured the same way as Empress 1, but
consisted of completely different ingrediences. Whereas
Empress 1 is a leucite-reinforced glass ceramic,
Empress 2 porcelain consisted of a disilicate core that wass
layered with a sintered glass ceramic. This sintered
glass ceramic contained fluorapatite crystals similar
to the needle-like fluorapatite crystals found
in fluoride-enriched natural tooth structure. This
process mimics natural tooth structure, not only
in composition through the use of fluorapatite,
but through the layering process of providing a strong
dentinal framework overlaid with a translucent enamel-like
layer. The sintered glass ceramic also has inherent
fluorescence, opalescence, and an enamel-like translucency.
With other systems that have tried multiple-unit,
metal-free bridges over the years, the underlying
framework was opaque and ruined the benefits of
being metal-free because it still ended up with
an opaque-looking bridge.
Empress 2 restorations looked much better. The framework actually became more translucent
during the fabrication process and complimented
the underlying tooth structure as soon as it is in the
mouth. Additionally, the framework itself had an incredibly
polishable surface and high wear compatibility with
the opposing natural teeth. Older generation ceramics
had been too brittle and hard and caused a wear of
the opposing natural teeth. Empress 2 had nearly
three times the strength and three times the fracture
toughness as the original material. Therfore it
was for a certain period the only metal-free material that was specifically
useful for cosmetic three-unit bridges.
Authentic:
Authentic is a great dental veneer porcelain. It is a second-generation Leucite-reinforced pressable ceramic.
This porcelain was originally introduced by Ceramay into the European market in early 1998 and was
subsequently introduced by Microstar Corp. to the U.S. market in September of 1998.
It offers 58 different fluorescent pellets (pressable ingot) choices in four opacity levels ranging from 20%, 30%, 45% and 70% opacity.
The vitality and fluorescence of the final porcelain veneers and crowns is associated with the properties of these ingots.
With each increase in ingot opacity, additional fluorescence is added to increase vitality, which can
emulate the natural dentition in all lighting sources.
This crown and veneer porcelain is extremely kind to opposing tooth structure in terms of wear characteristics.
Natural tooth structure has a VH (Vickers hardness) of 450, while most veneer porcelains range between 700 and 900.
The composition and average particle size of Authentic porcelain contribute to its low VH.
Due to an average particle size of just 4 microns, it makes it more difficult for dental plaque to form.
The flexural strength of this dental porcelain is 148 MPa. Its overlay ceramic measures 90 MPa.
Authentic pocelain veneers always require dentin bonding.
IPS e.max:
IPS e.max is an aesthetic and high-strength dental porcelain system.
IPS e.max Press are glass-ceramic ingots in three levels of opacity and in 2 sizes.
The ingots exhibit an optimized homogeneity, which results in a strength of about 400 MPa.
Therefore, the ingots are suitable for fabricating single crowns and bridges in the anterior and premolar region.
They have three levels of opacity: low translucency (LT), medium (MO) and high opacity (HO).
This allows us to fabricate lifelike aesthetics independent of the shade of the prepared tooth.
These porcelain restorations can be delivered by adhesive, self-adhesive and conventional cementation.
IPS e.max ZirPress porcelain system is a glass-ceramic ingot for the PRESS-ON technique.
This dental porcelain system uses fluorapatite glass-ceramic ingots to be pressed on IPS e.max ZirCAD frameworks.
This allows the fabrication of zirconium oxide-reinforced crowns and multi-unit bridges.
The strength of zirconium oxide frameworks is combined with the aesthetics of the press ceramic in the press-on technique.
The ingots are used to press onto both IPS e.max ZirCAD and other zirconium oxide frameworks in the CTE range of 10.5 - 11.0.
The fluorapatite crystals contained in the ingots control the interplay of translucency, opacity and brightness.
Therefore, the less translucent zirconium oxide frameworks are optimally masked.
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