Transcript Wiron  light


Wiron
light
The new non–precious PFM Alloy
Dr. Ulrich Abend
R & D Alloys
What do we expect from dental alloys?
• Function (mechanical properties, processing by dental
technician)
• Esthetics
• Biological properties
– Bio compatible
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Wiron light
Casting made simple
by excellent melting properties
–easy recognition of the proper moment for casting
–high fluidity of the melt: reliable filling of the mould
–low casting temperature: 1350 °C
–reduced preheating temperature: 800°C
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Wiron Light in Fornax T
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Wiron Light torche casting in Fundor T
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Wiron light
Easy finishing
by smooth surface after casting
–low temperatures during casting guarantee little
reaction with investment material
–thin oxides with light colour
–oxides are easy and fast to remove
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Wiron light
Reliable results
by outstanding mechanical properties
–high strength allows production of delicate structures
–CTE optimally adjusted: normal cooling, in general
–excellent bond strength for many available ceramics
–Light oxide for improved aesthetics after veneering
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Wiron light
SUMMARY
 Easy to cast
Casting temperature: 1350 °C / 2460 °F
Preheating temperature: 800 °C / 1472 °F
 Easy to grind
Light coloured oxide
 For reliable results
Outstanding strength
Normal cooling
-> www.bego.com
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VM 13
Finesse
Heraceram
Carmen
Veneered real C&B
Noritake
Creati
on
Carat
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d.Sign
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Corrosion behaviour of precious
and non precious alloys
Corrosion & bio compatibility
• Corrosion is the key to the bio compatibility of
alloys
• Reactions occur only if ions are released into the
body!
• The higher the amount of released ions, the higher
the risk of unwanted biological reactions
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Chromium content
Non precious alloys do not corrode because of passivation
Passivation: formation of mechanical and chemical stable
chromium oxide layers
20 % Chromium are necessary for stable layers!
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Non precious alloys (as casted)
Layer formed of chromium oxide
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Over 4 weeks cumulated ion release [µg/cm2]
Chromium content vs corrosion
5000
4500
4283
4000
Ni67Cr14Mo8Ga7Fe5
Ni65Cr23Mo9,5 (Wiron 99)
3500
Ni61Cr26Mo11Fe1
3000
2500
2000
1383
1500
1000
322
500
98 122
15 19
Ni
Cr
231
34 84
7
3
0
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Mo
Ga
Fe
Little booklet offer
informations about allergies
and testing substances.
Available in German, French
or English language by
BEGO.
To find, as well, at the BEGOHomepage (TrainingsCenter,
AllergieCompass)
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Wiron light
- beryllium-free Wiron 99
remains the BEGO premium nickel-chrome bonding alloy.
Wiron 99 users are happy and should stay happy!
Wiron light
is designed to offer the opportunity to win new customers
among the users of beryllium containing alloys!
The time is right! More and more technicians will become aware
of the danger in regard to beryllium and will swap their alloy.
Wiron light provides among other features
excellent melting properties,
a lighter oxide, a biocertificate and a favourable price
(less 15 % compared to Wiron 99)
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BEGO non-precious alloys
(1)
Ni-Cr
Bonding alloys
For acrylic veneering
Wiron 99
top
Wiron light
medium
Wirocer Plus
basic
BEGO Dental
Wirolloy NB
Wirolloy
Folie 20
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BEGO non-precious alloys
(2)
Co-Cr
Bonding alloys
Wirobond 280
Wirobond C
Wirobond SG
Partial denture alloys
top
Wirobond LFC
WIRONIUM alloys
medium
Wironit LA
basic
Wironit
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Wironit XH
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Thank you for your attention
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