1. Wiron  light The new non–precious PFM Alloy Dr. Ulrich Abend R & D Alloys

2. BEGO Dental Interdentdays 2008 Folie 2 What do we expect from dental alloys? Function (mechanical properties, processing by dental technician) Esthetics Biological properties –Bio compatible

3. BEGO Dental Interdentdays 2008 Folie 3 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

4. BEGO Dental Interdentdays 2008 Folie 4 Wiron Light in Fornax T

5. BEGO Dental Interdentdays 2008 Folie 5 Wiron Light torche casting in Fundor T

6. BEGO Dental Interdentdays 2008 Folie 6 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

7. BEGO Dental Interdentdays 2008 Folie 7

8. BEGO Dental Interdentdays 2008 Folie 8 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

9. BEGO Dental Interdentdays 2008 Folie 9 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 Wiron  light

10. BEGO Dental Interdentdays 2008 Folie 10

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12. BEGO Dental Interdentdays 2008 Folie 12 Veneered real C&B Carat Carmen Creati on d.Sign Finesse Heraceram Noritake VM 13

13. Corrosion behaviour of precious and non precious alloys

14. BEGO Dental Interdentdays 2008 Folie 14 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

15. BEGO Dental Interdentdays 2008 Chromium content Non precious alloys do not corrode because of passivation Passivation: Passivation: formation of mechanical and chemical stable chromium oxide layers 20 % Chromium are necessary for stable layers!

16. BEGO Dental Interdentdays 2008 Non precious alloys (as casted) Layer formed of chromium oxide

17. BEGO Dental Interdentdays 2008 4283 231 7 98 15 34 122 19 84 3 1383 322 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 NiCrMoGaFe Over 4 weeks cumulated ion release [µg/cm 2 ] Ni67Cr14Mo8Ga7Fe5 (Wiron 99) Ni65Cr23Mo9,5 (Wiron 99) Ni61Cr26Mo11Fe1 Chromium content vs corrosion

18. BEGO Dental Interdentdays 2008 Folie 18 Little booklet offer informations about allergies and testing substances. Available in German, French or English language by BEGO. To find, as well, at the BEGO- Homepage (TrainingsCenter, AllergieCompass)

19. BEGO Dental Interdentdays 2008 Folie 19 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) Wiron  light - beryllium-free -

20. BEGO Dental Interdentdays 2008 Folie 20 Ni-Cr Bonding alloysFor acrylic veneering Wiron 99 top Wiron light medium Wirocer Plus basic Wirolloy NBWirolloy BEGO non-precious alloys (1)

21. BEGO Dental Interdentdays 2008 Folie 21 Co-Cr Bonding alloys P artial denture alloys Wirobond 280 top WIRONIUM alloys Wirobond C medium Wironit LAWirobond LFC basic WironitWironit XHWirobond SG BEGO non-precious alloys (2)

22. BEGO Dental Interdentdays 2008 Folie 22 Thank you for your attention